The indictment of a former spy shows some of the challenges facing U.S. counterintelligence agencies.

Unlike many recent failed plots, the bombers did not attack a target -- or use tactics -- that were beyond their abilities.

The trend toward polarization, with the cartel landscape largely split between the Sinaloa Federation and Los Zetas, has been reversed.

A well-conceived security plan could mean the difference between life and death.

Many factors have led to a degree of radicalism among European Muslims that poses a challenge for European authorities.

Easing government investigations into drug crimes will do little to lessen violence in the country.

The magazine reveals much about the jihadists who published it.

The European crisis is galvanizing radical political parties, particularly in Greece, where there is an illustrious history of radicalism.

The media can make most potential pathogens appear far worse than the actual threat.

Whether it is part of an attack or an accident, fire is a deadly force for which everyone should be prepared.