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A former head of the Los Alamos National Laboratory has worked with Russia for years on securing loose nukes and upgrading facilities in the former Soviet Union. Siegfried Hecker is now writing a book about two decades of of nuclear cooperation.

The Islamist extremists have seized a string of towns in the northeast, displacing hundreds of thousands and creating a humanitarian crisis. Monday's attack on a boys school killed up to 50 students.

The veteran Tennessee senator is poised to take a leading role on education in the Republican-controlled Congress.

Supporters of expanded trade with Asian nations hoped this week would bring completion of a major deal, but U.S. and Japanese negotiators — and Obama and congressional Republicans — still don't agree.

Police in New Jersey say the man was drinking and wandered into the road.

The replica, nicknamed Stan, is for sale in the Hammacher Schlemmer Christmas catalog. It costs $100,000.

The existing tariff system, which adds as much as 25 percent to the cost of American high-tech exports, covers more than $4 trillion in annual trade, the White House says.

More than 80 surgeries were performed on women at a government-run camp Saturday; the first death was reported Monday morning.

Celebrity chefs haven't just made us aware of the latest noshing fashions; they have also spread the word about anti-hunger initiatives like those at the innovative DC Central Kitchen.

One-third of people have trouble downing pills, and many skip taking medications as a result. A researcher in Germany says that two techniques help. Really? We tested them ourselves to find out.