Today on New Scientist: 21 December 2012

Cadaver stem cells offer new hope of life after death

Stem cells can be extracted from bone marrow five days after death to be used in life-saving treatments

Apple's patents under fire at US patent office

The tech firm is skating on thin ice with some of the patents that won it a $1 billion settlement against Samsung

Himalayan dam-building threatens endemic species

The world's highest mountains look set to become home to a huge number of dams - good news for clean energy but bad news for biodiversity

Astrophile: Black hole exposed as a dwarf in disguise

A white dwarf star caught mimicking a black hole's X-ray flashes may be the first in a new class of binary star systems

Blind juggling robot keeps a ball in the air for hours

The robot, which has no visual sensors, can juggle a ball flawlessly by analysing its trajectory

Studio sessions show how Bengalese finch stays in tune

This songbird doesn't need technological aids to stay in tune - and it's smart enough to not worry when it hears notes that are too far off to be true

Giant tooth hints at truly monumental dinosaur

A lone tooth found in Argentina may have belonged to a dinosaur even larger than those we know of, but what to call it?

Avian flu virus learns to fly without wings

A strain of bird flu that hit the Netherlands in 2003 travelled by air, a hitherto suspected by unproven route of transmission

Feedback: Are wind turbines really fans?

A tale of "disease-spreading" wind farms, the trouble with quantifying "don't know", the death of parody in the UK, and more

The link between devaluing animals and discrimination

Our feelings about other animals have important consequences for how we treat humans, say prejudice researchers Gordon Hodson and Kimberly Costello

Best videos of 2012: First motion MRI of unborn twins

Watch twins fight for space in the womb, as we reach number 6 in our countdown of the top videos of the year

2012 Flash Fiction winner: Sleep by Richard Clarke

Congratulations to Richard Clarke, who won the 2012 New Scientist Flash Fiction competition with a clever work of satire

Urban Byzantine monks gave in to temptation

They were supposed to live on an ascetic diet of mainly bread and water, but the monks in 6th-century Jerusalem were tucking into animal products

The pregnant promise of fetal medicine

As prenatal diagnosis and treatment advance, we are entering difficult ethical territory

2013 Smart Guide: Searching for human origins in Asia

Africa is where humanity began, where we took our first steps, but those interested in the latest cool stuff on our origins should now look to Asia instead

The end of the world is an opportunity, not a threat

Don't waste time bemoaning the demise of the old order; get on with building the new one

Victorian counting device gets speedy quantum makeover

A photon-based version of a 19th-century mechanical device could bring quantum computers a step closer

Did learning to fly give bats super-immunity?

When bats first took to the air, something changed in their DNA which may have triggered their incredible immunity to viruses

Van-sized space rock is a cosmic oddball

Fragments from a meteor that exploded over California in April are unusually low in amino acids, putting a twist on one theory of how life on Earth began

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US gun lobby urges armed police in every school

WASHINGTON: The US' most powerful pro-gun lobbying group is suggesting that armed police be deployed to every school in the country following a mass shooting that left 20 young children dead.

The National Rifle Association, which supports a broad interpretation of US citizens' constitutional right to bear arms, had been under pressure to respond in the wake of last week's massacre in a Connecticut elementary school.

Even as the NRA leaders made their combative and determined appearance, another four people died in Pennsylvania in America's latest shooting spree, including the alleged shooter.

And a string of celebrities including Jeremy Renner, Gwyneth Paltrow and Beyonce launched a video to back a campaign to clamp down on gun sales following the Newtown school massacre.

But the pro-gun lobbyists ceded no ground to those calling for tougher gun laws.

"The only thing that stops a bad guy with a gun is a good guy with a gun," declared NRA vice-president Wayne LaPierre Friday, in his first public comments since the shooting at the Sandy Hook Elementary School in Newtown, Connecticut.

"I call on Congress today to act immediately to appropriate whatever is necessary to put armed police officers in every single school in this nation," he said, in a lengthy statement. He took no questions from reporters.

LaPierre said the NRA was ready to help train security teams for schools and work with teachers and parents to improve security measures, and accused the media and the political class of demonising gun owners.

Last Friday, a troubled 20-year-old man burst into the Sandy Hook school and gunned down 20 six- and seven-year-old children and six staff members trying to protect them, before taking his own life. He also fatally shot his mother.

As LaPierre and his allies were on stage in Washington on Feiday, police in Pennsylvania shot dead a man who had killed three people and wounded "several" others, state troopers.

These deaths were the latest in a series of mass shootings in the United States this year, and prompted President Barack Obama to throw his weight behind plans to revive a ban on assault weapons.

America has suffered an epidemic of gun violence over the last three decades including 62 mass shooting incidents since 1982. The vast majority of weapons used have been semi-automatic weapons obtained legally by the killers.

There were an estimated 310 million non-military firearms in the United States in 2009, roughly one per citizen, and people in America are 20 times more likely to be killed by a gun than someone in another developed country.

But LaPierre insisted gun ownership is not the problem.

"You know, five years ago after the Virginia Tech tragedy when I said we should put armed security in every school, the media called me crazy," he said, referring to a 2007 campus shooting that left 32 people dead.

"But what if, what if when Adam Lanza started shooting his way into Sandy Hook Elementary School last Friday, he'd been confronted by qualified armed security?" he demanded.

"Will you at least admit it's possible... that 26 innocent lives might have been spared that day? Is it so abhorrent to you that you'd rather continue to risk the alternative?"

The statement immediately drew criticism from supporters of tougher gun control, who are pushing to ban semi-automatic assault weapons like the .223 Bushmaster rifle that Lanza used in Friday's shooting.

"The NRA leadership's drive to fill our schools with more deadly guns and ammo is wildly out of touch with responsible gun owners and the American public," New Jersey Senator Frank Lautenberg said.

The New York Times, in an editorial Saturday, did not mince words, calling LaPierre's remarks a "mendacious, delusional, almost deranged rant".

One of the protesters, who attempted to drown out LaPierre's statement, bore a banner reading "NRA kills our kids" the other "NRA has blood on its hands". They were led away by security.

Hollywood stars including Julianne Moore, Jamie Foxx and Jon Hamm meanwhile recorded a video backing a campaign calling notably for a ban on assault weapons, as well as criminal background checks for every gun sold.

"Columbine. Virginia Tech. Tucson. Aurora. Fort Hood. Oak Creek. Newtown. Newtown. Newtown," they intoned in the black-and-white video, taking turns to list the names of America's worst gun massacres of recent years.

"How many more? How many more colleges? How many more classes? How many more movie theatres? How many more houses of faith? How many more shopping malls?" they added in the video on the "Demand a Plan" campaign website.

- AFP/al

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Why does my external hard drive only show 2.2TB?

External hard drives are exceptionally useful for expanding storage capabilities for both backups and data management. While external hard drives are often sold in preconfigured packages by manufacturers, another popular option is to purchase an external hard-drive enclosure and then use any drive of your choice in it. This is beneficial because as your demands for storage increase, you can replace the enclosure's drive with a larger one.

These days, the availability of hard drives with 4TB of storage are enticing for people to swap into their existing enclosures; however, when doing so they may find that the system will only recognize 2.2TB of the drive, regardless of how they partition or format the device.

While modern file-system formats such as HFS+, NTFS, and ExFAT ought to handle volume sizes of between hundreds of gigabytes to zettabytes, and though operating systems like OS X have increased the maximum volume size from 2TB to 8EB (exabytes) over the years, there are hardware limitations that may limit the size of the volume that can be used. If you are using an older drive enclosure for your large hard drive, then the controllers on it may not be capable of handling over 2.2TB, regardless of the software environment being used around it.

This problem happens because of the use of LBA (logical block addressing) in modern hard-drive controllers coupled with a hardware-based limit of how many blocks can be included in the LBA scheme. Early LBA controllers used 32-bit (or lower) addressing coupled with a maximum supported block size of 512 bytes. This means they support up to 2^32 or 4,294,967,296 blocks for a device, and with each block being 512 bytes, this translates to a maximum of 2,199,023,255,552 bytes, or 2.199TB.

Unfortunately in many cases these limits are hard-coded in enclosure's firmware, so even though modern drives use 4,096-byte sectors, the system will still only address these sectors as 512 bytes in size, resulting in both a waste of space and degraded performance.

The only way around this problem is to replace your drive enclosure with a new one that has proper support for both 48-bit (or greater) LBA and 4,096-byte sectors in hard drives. Luckily most enclosures on the market today do support this, so if you run into this problem, you should be up and running in no time.

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Pictures: Fungi Get Into the Holiday Spirit

Photograph courtesy Stephanie Mounaud, J. Craig Venter Institute

Mounaud combined different fungi to create a Santa hat and spell out a holiday message.

Different fungal grow at different rates, so Mounaud's artwork rarely lasts for long. There's only a short window of time when they actually look like what they're suppose to.

"You do have to keep that in perspective when you're making these creations," she said.

For example, the A. flavus fungi that she used to write this message from Santa grows very quickly. "The next day, after looking at this plate, it didn't say 'Ho Ho Ho.' It said 'blah blah blah,'" Mounaud said.

The message also eventually turned green, which was the color she was initially after. "It was a really nice green, which is what I was hoping for. But yellow will do," she said.

The hat was particularly challenging. The fungus used to create it "was troubling because at different temperatures it grows differently. The pigment in this one forms at room temperature but this type of growth needed higher temperatures," Mounaud said.

Not all fungus will grow nicely together. For example, in the hat, "N. fischeri [the brim and ball] did not want to play nice with the P. marneffei [red part of hat] ... so they remained slightly separated."

Published December 21, 2012

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Obama Still an 'Optimist' on Cliff Deal

Mandel Ngan/AFP/Getty Images

WASHINGTON D.C. – Ten days remain before the mandatory spending cuts and tax increases known as the “fiscal cliff” take effect, but President Obama said he is still a “hopeless optimist” that a federal budget deal can be reached before the year-end deadline that economists agree might plunge the country back into recession.

“Even though Democrats and Republicans are arguing about whether those rates should go up for the wealthiest individuals, all of us – every single one of us -agrees that tax rates shouldn’t go up for the other 98 percent of Americans, which includes 97 percent of small businesses,” he said.

He added that there was “no reason” not to move forward on that aspect, and that it was “within our capacity” to resolve.

The question of whether to raise taxes on incomes over $250,000 remains at an impasse, but is only one element of nuanced legislative wrangling that has left the parties at odds.

For ABC News’ breakdown of the rhetoric versus the reality, click here.

At the White House news conference this evening, the president confirmed he had spoken today to Senate Majority Leader Harry Reid, D-Nev., and House Speaker John Boehner, R-Ohio, although no details of the conversations were disclosed.

The talks came the same day Speaker Boehner admitted “God only knows” the solution to the gridlock, and a day after mounting pressure from within his own Republican Party forced him to pull his alternative proposal from a prospective House vote. That proposal, ”Plan B,” called for extending current tax rates for Americans making up to $1 million a year, a far wealthier threshold than Democrats have advocated.

Boehner acknowledged that even the conservative-leaning “Plan B” did not have the support necessary to pass in the Republican-dominated House, leaving a resolution to the fiscal cliff in doubt.

“In the next few days, I’ve asked leaders of Congress to work towards a package that prevents a tax hike on middle-class Americans, protects unemployment insurance for 2 million Americans, and lays the groundwork for further work on both growth and deficit reduction,” Obama said. ”That’s an achievable goal.  That can get done in 10 days.”

Complicating matters: The halls of Congress are silent tonight. The House of Representatives began its holiday recess Thursday and Senate followed this evening.

Meanwhile, the president has his own vacation to contend with. Tonight, he was embarking for Hawaii and what is typically several weeks of Christmas vacation.

However, during the press conference the president said he would see his congressional colleagues “next week” to continue negotiations, leaving uncertain how long Obama plans to remain in the Aloha State.

The president said he hoped the time off would give leaders “some perspective.”

“Everybody can cool off; everybody can drink some eggnog, have some Christmas cookies, sing some Christmas carols, enjoy the company of loved ones,” he said. “And then I’d ask every member of Congress, while they’re back home, to think about that.  Think about the obligations we have to the people who sent us here.

“This is not simply a contest between parties in terms of who looks good and who doesn’t,” he added later. “There are real-world consequences to what we do here.”

Obama concluded by reiterating that neither side could walk away with “100 percent” of its demands, and that it negotiations couldn’t remain “a contest between parties in terms of who looks good and who doesn’t.”

Boehner’s office reacted quickly to the remarks, continuing recent Republican statements that presidential leadership was at fault for the ongoing gridlock.

“Though the president has failed to offer any solution that passes the test of balance, we remain hopeful he is finally ready to get serious about averting the fiscal cliff,” Boehner said. “The House has already acted to stop all of the looming tax hikes and replace the automatic defense cuts. It is time for the Democratic-run Senate to act, and that is what the speaker told the president tonight.”

The speaker’s office said Boehner “will return to Washington following the holiday, ready to find a solution that can pass both houses of Congress.”

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Van-sized space rock is a cosmic oddball

The shattered remains of a high-profile space rock are oddly low in organic materials, the raw ingredients for life. The discovery adds a slight wrinkle to the theory that early Earth was seeded with organics by meteorite impacts.

In April a van-sized meteor was seen streaking over northern California and Nevada in broad daylight. The fireball exploded with a sonic boom and sprayed the region with fragments. Videos, photographs and weather radar data allowed the meteor's trajectory to be reconstructed, and teams quickly mobilised to search for pieces in the foothills of the Sierra Nevada in northern California.

Researchers readily identified the meteorites as rare CM chondrites, thought to be one of the oldest types of rock in the universe. "Because the meteorites were discovered so freshly, for the first time we had a chance to study this type of meteorite in a pristine form," says Peter Jenniskens of the SETI Institute in Mountain View, California, who led the search effort and the subsequent study of the space rocks.

Jenniskens personally found a fragment in a parking lot, where it remained relatively free of soil contaminants. "That's the best you could hope for, other than landing in a freezer," says Daniel Glavin of NASA's Goddard Space Flight Center in Greenbelt, Maryland.

Battered past

CM chondrites make up only about 1 per cent of known meteorites. Most of them contain plenty of organic materials, including amino acids, the building blocks of life on Earth.

Jenniskens and colleagues found that the California fragments also have amino acids, including some not found naturally on Earth. But in three rocks collected before a heavy rainstorm, which bathed the other pieces in earthly contaminants, organics are less abundant by a factor of 1000 than in previously studied CM chondrites.

These three rocks could not have lost organics due to space "weathering": analysis of the meteorites' exposure to cosmic rays suggests the original meteor was flying through space for only about 50,000 years before hitting Earth.

Based on its trajectory and its relatively short flight time, Jenniskens thinks the meteor can be traced back to a family of asteroids dominated by 495 Eulalia, a group known as a possible source of CM chondrites. It is probably a piece that broke off during an impact, revealing the relatively pristine material inside.

So what happened to its organics? Jenniskens' team found that the meteorites are breccia – smaller rocks cemented together – which suggests that the asteroid from which they came took a series of beatings. Those impacts, or possibly other processes inside the asteroid, could have heated it enough to destroy most organic material.

Limited delivery

The result might have implications for the organics delivery theory, says Bill Bottke of the Southwest Research Institute in Boulder, Colorado.

"It shows that not all asteroids can deliver sufficient quantities. One of the disappointments is that, from a prebiotic organic chemistry perspective, it was very limited," says Bottke. "But this is an unusual case. Most [CM chondrites] are loaded with organic compounds."

Still, studying the space rocks will help us prepare future missions to asteroids such as OSIRIS-Rex, scheduled to take off for asteroid 1999 RQ36 in 2016 and bring a sample back in 2023.

"In some ways, we've had a sample, a very fresh one, come to us," says Bottke. "This is a test bed for the techniques we'll use in that mission."

Journal reference: Science, DOI: 10.1126/science.1227163

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Britain's Akram Khan's dance of creative destruction

PARIS: A year ago, Akram Khan was told his dance career was over. Now, with the Olympics ceremony under his belt, two films on the boil and three shows on tour, Britain's best-known choreographer could hardly be busier if he tried.

The 38-year-old ball of energy is in Paris this month with his most personal work to date, DESH, a full-length solo exploring his family roots in Bangladesh, through his signature fusion of contemporary dance with north Indian Kathak.

Khan's schedule for the coming months sounds like a plate-spinning act, but when he ripped his Achilles tendon during a rehearsal last January, doctors feared he would never dance again.

"It was very traumatic," he told AFP, "Ballet dancers don't come back after an Achilles tendon rupture. It's very rarely possible."

Shows were cancelled, plans cut short as Khan -- unable to walk for two months -- headed into a "humiliating" round of surgery and physiotherapy.

"I'm a dancer, so it's ego you know, somebody's telling you how to do a simple walk. I wanted to shoot them!"

"But from that it went into running, jogging, then jumping, then a little bit of confidence comes back.

"And then suddenly you're in the Olympics!" joked Khan, who choreographed and performed in a segment of the August opening ceremony.

In his solo DESH, a chameleonic Khan gives life to a dense cast of characters as the action shifts, dreamlike, from his south London birthplace to the grimy, noisy streets of Bangladesh over 80 visually-sumptuous minutes.

While he has recovered mobility, Khan has yet to get his full strength back, and had to make changes to perform the show, on world tour after premiering in London to rapturous reviews last year.

"You find other ways, and that was very valuable," he said, "I'm stronger in other ways."

Right now Khan is preparing a duet with the Flamenco dancer Izrael Galvan, in between touring with two more of his shows -- Gnosis and Sacred Monsters.

Come May he will premiere a creation called iTMOi inspired by Igor Stravinsky's "Rite of Spring" in the French city of Grenoble, before taking that show on the road as well.

Recent sideline projects have included teaming up with the artist Anish Kapoor to shoot a spoof "Gangnam Style" video in support of Chinese dissident artist Ai Wei Wei.

As if that wasn't enough, he is choreographing a film called "Desert Dancer", based on the true story of a young Iranian man persecuted for his love of dance, and is hoping to direct a film based on DESH.

In terms of juggling projects, Khan says he is busier than ever before. And in March he will become a father for the first time, when his Japanese dancer wife gives birth to a baby girl.

The story of Khan's injury and recovery loops back to an earlier one of how, as a little boy, he liked to break things to see what was inside.

"I was destructive as a child, I was fascinated to see things broken and put back together again," he told AFP, "I was very physical, I couldn't keep my hands still."

That was how Khan's mother started teaching her three-year-old son the folk dance Kathak, today the backbone of his art. To tire him out, like others might send a child to kick a ball around the yard.

Formal lessons followed aged seven, but it was long a battle of wills with a mother determined to share -- "impose", he jokes -- her culture with him.

"It was traumatic," said Khan, who talks with disarming candour, and wry humour, of his upbringing, "My mother used to bribe me, with toys, each performance I would get a little matchbox car."

While he jokes about his strong-willed mother, Khan is clear the "challenging relationship" in his life is with his father, bent on rooting out the Westerner in his son and making a true Bengali of him.

"DESH is very much about my father," he says of the piece, which opens with a scene showing him burying his father before pounding violently at the earth, as if to root out the story of their shared past.

Like a grown-up version of the creative destruction he displayed as a child.

Co-created with the poet Karthika Nair, the visual designer Tim Yip and the composer Jocelyn Pook, the work has a political dimension too, reflecting his sense that "everything is political" in Bangladesh, starting with the drinking water polluted by Western waste dumping.

"This is my story. It's part true, part lie," he says, "It needed to be epic, because it was very personal."

But for now, Khan jokes, he is done digging for his family roots: "I think I need to move on -- I need to get a life!"

-AFP/fl

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Senate approves Netflix-backed amendment to video privacy law

Ready to share your Netflix viewing on Facebook?

(Credit:
LG)

The U.S. Senate has approved legislation to amend a 1988 law that would make it easier for people to share their video-viewing habits online should the Netflix-backed bill win President Obama's signature.

The Senate approved revisions this evening to the Video Privacy Protection Act to allow video rental companies to obtain consent from customers in order to share information about their viewing preferences on social networks. The 24-year-old law was enacted after a newspaper printed the video rental history of Judge Robert H. Bork during his Supreme Court nomination hearings.

Bork died yesterday at age 85, a day after the U.S. House of Representatives approved the legislation.

A Netflix representative applauded the Senate's approval and promised to introduce new products should the president sign the bill.

"We are pleased the Senate has moved quickly to modernize the VPPA, giving consumers more freedom to share with friends when they want," Netflix spokesman Joris Evers said in a statement. "After the president signs the bill, we will introduce social features for our U.S. members in 2013."

Users outside of the United States have the option to link their Netflix accounts with Facebook, allowing them frictionless sharing of their video viewing preferences with other member of their online social network.

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Hollies Get Prickly for a Reason

With shiny evergreen leaves and bright red berries, holly trees are a naturally festive decoration seen throughout the Christmas season.

They're famously sharp. But not all holly leaves are prickly, even on the same tree. And scientists now think they know how the plants are able to make sharper leaves, seemingly at will. (Watch a video about how Christmas trees are made.)

A new study published in the Botanical Journal of the Linnean Society suggests leaf variations on a single tree are the combined result of animals browsing on them and the trees' swift molecular response to that sort of environmental pressure.

Carlos Herrera of the National Research Council of Spain led the study in southeastern Spain. He and his team investigated the European holly tree, Ilex aquifolium. Hollies, like other plants, can make different types of leaves at the same time. This is called heterophylly. Out of the 40 holly trees they studied, 39 trees displayed different kinds of leaves, both prickly and smooth.

Five holly leaves from the same tree.

Photographs by Emmanuel Lattes, Alamy

Some trees looked like they had been browsed upon by wild goats and deer. On those trees, the lower 8 feet (2.5 meters) had more prickly leaves, while higher up the leaves tended to be smooth. Scientists wanted to figure out how the holly trees could make the change in leaf shape so quickly.

All of the leaves on a tree are genetic twins and share exactly the same DNA sequence. By looking in the DNA for traces of a chemical process called methylation, which modifies DNA but doesn't alter the organism's genetic sequence, the team could determine whether leaf variation was a response to environmental or genetic changes. They found a relationship between recent browsing by animals, the growth of prickly leaves, and methylation.

"In holly, what we found is that the DNA of prickly leaves was significantly less methylated than prickless leaves, and from this we inferred that methylation changes are ultimately responsible for leaf shape changes," Herrera said. "The novelty of our study is that we show that these well-known changes in leaf type are associated with differences in DNA methylation patterns, that is, epigenetic changes that do not depend on variation in the sequence of DNA."

"Heterophylly is an obvious feature of a well-known species, and this has been ascribed to browsing. However, until now, no one has been able to come up with a mechanism for how this occurs," said Mike Fay, chief editor of the Botanical Journal of the Linnean Society and head of genetics at the Kew Royal Botanic Gardens. "With this new study, we are now one major step forward towards understanding how."

Epigenetic changes take place independently of variation in the genetic DNA sequence. (Read more about epigenetics in National Geographic magazine's "A Thing or Two About Twins.")

"This has clear and important implications for plant conservation," Herrera said. In natural populations that have their genetic variation depleted by habitat loss, the ability to respond quickly, without waiting for slower DNA changes, could help organisms survive accelerated environmental change. The plants' adaptability, he says, is an "optimistic note" amidst so many conservation concerns. (Related: "Wild Holly, Mistletoe, Spread With Warmer Winters.")

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Fiscal Cliff 'Plan B' Is Dead: Now What?

Dec 20, 2012 11:00pm

The defeat of his Plan B — Republicans pulled it when it became clear it would be voted down — is a big defeat for Speaker of the House John Boehner.  It demonstrates definitively that there is no fiscal cliff deal that can pass the House on Republican votes alone.

Boehner could not even muster the votes to pass something that would only allow tax rates on those making more than $1 million to go up.

Boehner’s Plan B ran into opposition from conservative and tea party groups -including Heritage Action, Freedom Works and the Club for Growth – but it became impossible to pass it after Senate Democrats vowed not to take up the bill and the president threatened to veto it.  Conservative Republicans saw no reason to vote for a bill conservative activists opposed – especially if it had no hopes of going anywhere anyway.

Plan B is dead.

Now what?

House Republicans say it is now up to the Senate to act.  Senate Democrats say it is now up to Boehner to reach an agreement with President Obama.

Each side is saying the other must move.

The bottom line:  The only plausible solution is for President Obama and Speaker Boehner to do what they have failed repeatedly to do:  come up with a truly bi-partisan deal.

The prospects look grimmer than ever. It will be interesting to see if the markets react.

SHOWS: This Week

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