Credit: Terrorists and criminal networks are using different tactics to build dangerous empires that might soon eclipse the power of legitimate countries.

Global despair continues to feed terrorism’s influence

Exclusive: Deputy CIA director: U.S. faces urgent challenges

Growing pool of terrorists overwhelms tracking capabilities

Decorated Marine says he was beaten, robbed in racial attack

The Hunt: ISIL is not the only big threat facing the U.S.

U.S. and allies ‘mistakes’ blamed for continued rise of terrorism