The reliance on unmanned drones to target terror suspects in Pakistan has been quietly lauded by U.S. officials. But the covert program, which has so far gotten little public scrutiny, is facing moun…

Pakistan is key to success in U.S.-led  counterterrorism efforts, with its tribal areas serving as terrorist havens. But covert U.S. military actions inside Pakistan put the future of the U.S.-Pakist…

A profile of the international terrorist network that the United States has singled out as the most serious threat to U.S. security.

A possible transfer of political power in the congressional midterm elections could doom short-term chances for a comprehensive climate bill. But experts say climate issues could still be addressed t…

Debating global warming policy has moved to the top of agendas worldwide, but some skeptics still question whether action is necessary or possible.