Western Europe’s burgeoning Islamic population continues to spark concerns about Muslim assimilation and a cultural divide.

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

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…

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

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…