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A cloture vote on the nomination of former Republican Sen. Chuck Hagel for defense secretary failed in the Senate, today.

That means Senate Republicans succeeded — with a vote of 58 to 40 — in keeping the Hagel nomination from coming before a final vote. Senate Majority Leader Harry Reid scheduled the cloture vote after Republicans refused to give unanimous consent to proceed with the final vote.

The proposed marriage of American Airlines and US Airways announced Thursday is likely the last in a series of industry mega-mergers, but history suggests combining two big carriers isn't easy.

"The history of airline mergers in the U.S. is good, bad and ugly," says Henry Harteveldt, a travel industry analyst at the consulting firm Hudson Crossing. He and many others point to the 2008 union of Delta and Northwest as the best merger in recent memory.

As the Carnival Triumph drifted for days in the Gulf of Mexico, we wondered: Instead of undertaking a slow, arduous tow to Mobile, Ala., wouldn't it have been easier — and more comfortable for passengers — to send an empty cruise ship to the area and evacuate the 3,143 passengers?

President Obama will cap off a busy week of politicking with some R&R in Florida.

Obama plans to travel to the West Palm Beach area for what his spokesman called "some well-deserved downtime."

"He's going to spend Presidents Day weekend relaxing with some friends," said White House spokesman Josh Earnest. "There's no work on the schedule."

Many of the drugs we take aren't actually digested — they pass through our bodies, and down through the sewer pipes. Traces of those drugs end up in the bodies of fish and other wildlife. Nobody's sure what effect they have.

Now, a paper being published in Science magazine finds that drugs for anxiety drugs — even at these very low levels — can affect the behavior of fish.

In a federal court today, prosecutors said former San Diego Mayor Maureen O'Connor misappropriated $2 million of her late husband's charitable foundation because of a gambling addiction.

During a period between 2000 and 2008, reports the San Diego Union Tribune, prosecutors say O'Connor gambled away more than $1 billion.

The paper reports:

Apparently, the undead aren't even welcome in the ever polite Great North.

Today we got more troubling news for the world economy: Germany's GDP slipped 0.6 percent in the final quarter of 2012, sending the Eurozone deeper into recession.

The Guardian spoke to Carsten Brzeski and analyst for ING, who said:

Transcript

NEAL CONAN, HOST:

This is TALK OF THE NATION. I'm Neal Conan in Washington. One of the most critically acclaimed and most popular films of the year, "Zero Dark Thirty," is up for five Oscars, including Best Picture. The film follows the hunt for Osama bin Laden and sparked controversy for its depiction of CIA interrogation techniques, including water boarding.

(SOUNDBITE OF MOVIE, "ZERO DARK THIRTY")

JASON CLARKE: (As Dan) Come on, give it to me. Hasam(ph) was a friend of Gramzi Yusef(ph). You guys met in Iran back in the '90s.

A future without weeds would be a kind of farmer utopia, but currently, herbicide-resistant "superweeds" are part of today's reality. Some researchers, though, are looking for a solution that seems ripped from science fiction: weed-seeking robots.

NASA calls it a "small near-Earth asteroid."

Transcript

NEAL CONAN, HOST:

This is TALK OF THE NATION. I'm Neal Conan.

This morning, hundreds of Somali men and women gathered in a community center in Mogadishu after a flash mob. Campaigners in Parliament Square in London held up one finger while MPs debated violence against women inside Westminster. And hundreds of Egyptian sang and danced after 10 a.m., Cairo time, all that from live coverage provided by The Guardian. Events all marked V-Day and its One Billion Rising campaign, designed to boost awareness of violence against women all over the world.

Transcript

NEAL CONAN, HOST:

This is TALK OF THE NATION. I'm Neal Conan in Washington. You can soon add US Airways to a long list that includes TWA, Pan Am, Eastern, Western, Braniff and so many others. US Airways will merge with American. The new American Airlines will be the world's largest, and after decades of consolidation, one of just four major airlines in the U.S.

Transcript

NEAL CONAN, HOST:

Gen. Joseph Dunford, the new U.S. and International Security Assistance Force, or ISAF, commander in Afghanistan, has only been in charge for a few days, and already he's been summoned to Afghan President Hamid Karzai's office for what looks like a dressing down, according to a press release from the president's office.

Dunford was called in to discuss what was initially reported as an ISAF airstrike in Kunar province that killed 10 civilians late Tuesday night.

Delicate phrasing, with both voice and guitar, has always made Richard Thompson a musician worth hearing — and sometimes even liking on a personal level. For a man who can make such pretty music, it's to his credit that he prefers to show his thorny, stubborn, cranky, even mean side in many of the songs in his solo career.

Host Michel Martin continues the conversation with Cleopatra Cowley-Pendleton. Her 15-year-old daughter was shot to death in Chicago last month, and President Obama highlighted the tragedy in his State of the Union address. Cowley-Pendleton talks about what she would like national leaders to think about when debating gun control policy.

President Obama visits Chicago Friday to talk about gun violence. But some of the people most affected say their voices aren't being heard. Host Michel Martin speaks with Aisha Truss-Miller and Chris Buford of the Black Youth Project, the group whose petition led to presidential visit.

The number of women who have used emergency contraceptive pills has increased dramatically in the past decade, according to the latest government data.