NBC News has learned that ISIS is using a web-savvy new tactic to expand its global operational footprint -- a 24-hour Jihadi Help Desk to help its foot soldiers spread its message worldwide, recruit followers and launch more attacks on foreign soil. Counterterrorism analysts affiliated with the U.S. Army tell NBC News that the ISIS help desk, manned by a half-dozen senior operatives around the clock, was established with the express purpose of helping would-be jihadists use encryption and other secure communications in order to evade detection by law enforcement and intelligence authorities. The relatively new development -- which law...