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

A profile of the terrorist organization based in the southern Philippines.

Amid a growing insurgency and escalating economic troubles in Pakistan, U.S. President Barack Obama said the United States must "help Pakistan help Pakistanis." Experts say strengthening the country’…

The contentious border between Pakistan and Afghanistan remains a site of major conflict, and houses some of the world’s most dangerous militants.

A profile of a militant Islamist Kurdish separatist movement seeking to transform Iraq into an Islamic state.