Mark Memmott

Saying that "above all else, we both agree that President Obama must be defeated," Rick Santorum on Monday evening endorsed former Republican rival Mitt Romney's presidential bid.

In an email to supporters, the former Pennsylvania senator said that:

Though she won't put a timetable on when activist Chen Guangcheng will be able to leave China with his family and go to the United States, Secretary of State Hillary Rodham Clinton said today that "we're certainly making progress."

Think the players on your favorite team are the most overpaid in the world?

Well, American sports fans, you may not be able to brag (or complain?) about that.

As the number crunchers at Sporting Intelligence reported earlier this month, European soccer teams hold the top four spots when it comes to average pay per player.

By saying Sunday on NBC's Meet the Press that he is "absolutely comfortable" with equal rights for partners in same-sex marriages and that love is at the root of all marriages "whether they're marriages of lesbians or gay men or heterosexuals," Vice President Biden has set off speculation about whether the Obama administration may soon fully endorse same-sex marriage.

The mystery surrounding the death of Army Capt. Bruce Kevin Clark, who collapsed on April 30 while on a Skype call from Afghanistan to his wife back in the U.S., has deepened.

After two years in second place, Exxon Mobil is back on top of the Fortune 500.

With 2011 revenues of $452.9 billion, the oil and energy giant edged out Wal-Mart Stores, which brought in $447 billion, Fortune magazine just reported.

Wal-Mart took the top spot from Exxon Mobil two years ago and held on to it again last year. Soaring oil prices are a major factor in Exxon's move back to No. 1.

"The United States has for several years been secretly releasing high-level detainees from a military prison in Afghanistan as part of negotiations with insurgent groups," reports The Washington Post, which calls the program "a bold effort to quell violence, but one that U.S. officials acknowledge poses substantial risks."

(Note: We updated the market news in this post at midday.)

A victory Sunday by Socialist presidential candidate Francois Hollande in France and the rejection by voters in Greece of that country's austerity policies have caused a "seismic shift" that threatens the future of the euro,

Update at 2:30 p.m. ET: The news that Adam Yauch of the Beastie Boys has died has now been confirmed by the group's public relations firm.

Our original post:

It was just a week ago that he dropped into our lives.

Now, we're sorry to report that "falling bear" is dead.

In case you're not familiar with the story, it was April 26 when University of Colorado Boulder student Andy Duann snapped a shot of a tranquilized bear as it was falling from a tree on campus.

The bear survived and was released back into the wild about 50 miles from Boulder.

Saying that the rules would "make sure that fracturing operations conducted on public and Indian lands follow common-sense industry best practices," Interior Secretary Ken Salazar this morning issued proposed regulations that would:

-- Require "public disclosure of chemicals used in hydraulic fracturing operations on federal lands."

-- Ensure that "wells used in fracturing operations [on public lands] meet appropriate construction standards."

-- Require operators to "put in place appropriate plans for managing flowback waters from fracturing operations."

As soon as it was learned on Wednesday that former NFL star Junior Seau had killed himself, there was speculation about whether he may have suffered brain injuries during his career that in turn led to depression or dementia.

Sixty seven years later, The Associated Press is apologizing for the way it condemned and then fired one of its correspondents for reporting "perhaps the biggest scoop in its history."

Edward Kennedy was among a small group of reporters taken by Allied military officials to witness the May 7, 1945, surrender by German forces at a schoolhouse in Reims, France.