Undercover NYPD detective finds hints of danger among mosques

The men discussed violent jihad in bookstores, private houses and on buses en route to paintball and shooting-range events. He was invited to join in "bonding" activities like working out at a gym and martial arts training in parks at night, during which the group discussed ideological justifications for killing Westerners. He also watched military movies and jihadist videos with groups of young men in private homes. During one such evening, one man got so excited he punched a wall. The detective reported that some youths became extremists after they traveled to their home countries; others went on the hajj - the pilgrimage to Mecca - and came back fired up by imams who encouraged violence as a religious obligation. ...