After more than three decades of existence, the Group of Eight (G8) is struggling to defend its relevance amid criticism of its limited membership and lack of a compliance mechanism.

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…

Retired Adm. Dennis C. Blair, President Obama’s director of national intelligence, is a former commander of the U.S. Pacific Command with long military experience.