Sebastian Rotella

The president’s “zero tolerance” policy drains manpower and money from deeper probes that target criminal syndicates.

Officials say National Security Agency intercepts stopped David Coleman Headley's planned attack in Denmark, but sources say a tip from the British led to his capture after the U.S. failed for years to connect multiple reports of terror ties.

Sophisticated lessons in spycraft, explosives,and arms, detailed by a rare inside look at Hezbollah during a recent terror trial in Cyprus, are forcing the European Union to consider designating the Lebanese-based group as a terrorist organization.

A new report helps explain why Pakistan has resisted international pressure to crack down on Lashkar-e-Taiba, one of the world's most dangerous militant organizations, after it killed 166 people in Mumbai — six U.S. citizens included — and came close to sparking conflict between nuclear-armed Pakistan and India.

Lashkar-e-Taiba's well-educated troops defy the idea that poverty and ignorance breed extremism.

U.S. authorities are building a politically explosive case that Hezbollah, the Lebanese militant group, finances itself through a vast drug-smuggling network that links a Lebanese bank, a violent Mexican cartel, and U.S. cocaine users.