An increase in terror incidents involving Islamic radicals who are U.S. citizens is vexing law enforcement officials and posing new questions about the roots of their radicalization.

Technology plays an increasing role in Homeland Security efforts, spawning a growing U.S.industry for everything from biometrics to cargo screening at ports.

In a region seen as turning leftward, forging alliances would seem a natural course of events. But Bolivian President Evo Morales’ decision to nationalize the oil and gas industry is exposing tension…

Sandinista leader Daniel Ortega leads the polls ahead of November 5 presidential elections and appears on the verge of an extraordinary political comeback. It remains unclear what an Ortega presidenc…

President Obama has made "strategic communications" an essential part of his move to boost the military and nation-building effort in Afghanistan. But experts say countering Taliban messaging will ta…