Rick Santorum swept the Mississippi and Alabama primaries on Tuesday, leaving Mitt Romney a distant third. Newt Gingrich maintains he'll carry on, and third-place finisher Mitt Romney faces renewed doubts about his ability to win over conservative Republicans, though he's leading the delegate race.

President Bashar Assad and his opposition continue to crack down on rebels in Syria. U.N. envoy Kofi Annan met with Assad to try to broker a cease fire, but failed. The U.N. Security Council is drafting another resolution to support the Arab League request to have Assad step down from power.

The Pentagon says an Afghan drove a stolen truck onto the airfield of a British base in southern Afghanistan at high speeds until it crashed into a ditch and exploded into flames.

The incident at Camp Bastion happened around the same time that U.S. Secretary of Defense Leon Panetta landed in the country.

"At no point was the Secretary or anyone on the aircraft in any danger from this incident," the International Security Assistance Force said in a statement.

Cooling a person's hands while exercising can make for a better workout, especially for people who hate to exercise because it makes them all hot and sweaty.

This might help the many, many people who have a hard time keeping up with exercise because it's just plain uncomfortable.

Researchers tested the idea with obese women in their 30s and 40s who worked out on a treadmill. The women whose palms were cooled with a device that circulated ice water were able to exercise longer than the women whose palms were exposed to room temperature water.

There's a new record in the Iditarod: A 25 year old has become the youngest musher to win the approximately thousand-mile trans-Alaskan sled dog race.

Dallas Seavey slid into Nome, Alaska, at 7:29 p.m. yesterday with nine dogs, finishing the race in nine days, four hours, 29 minutes and 26 seconds.

"We went into this race with a dog team that I knew had the ability to win the Iditarod," Seavey said in a post-race press conference in Nome. "We spent most of the race building a monster – a dog team that couldn't be stopped."

Greg Smith is a fairly ordinary name — but it's now one that's all the talk of Wall Street after he quit his position at Goldman Sachs today in one of the most amazingly public ways:

With an essay in The New York Times that accuses Goldman Sachs of having a money-is-everything culture that is "toxic and destructive."

One year into the Syrian uprising, with the world community reluctant to intervene, one international group has taken a direct and risky role in Syria — even taking a part in the high-profile evacuation of Western journalists from the besieged city of Homs.

Avaaz, a global online pressure group based in New York, has given crucial support to the uprising and the Syrian activist networks that aim to topple the regime of President Bashar Assad.

President Obama and British Prime Minister David Cameron are due to hold a news conference at the White House just after noon ET.

We'll live blog as they speak, so check back as the time approaches and hit your "refresh" button every once in a while after they get started.