Mexico is taking a more holistic approach to the cartel problem but will not abandon the use of force against cartels.
Counterterrorism agencies cannot detect every threat and defend every possible target, but grassroots defenders can help.
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.