Knowledge of Jihad identifiers allows law enforcement to connect the dots before major terrorist attacks -- and solve cold cases. These identifiers provide unique insights into the recruitment and indoctrination that led to the Boston bombings and other attacks against America. If you see one, contact your department head or homeland security officer.
Hours before he drove into a Texas parking lot last week and opened fire with an assault rifle outside a Prophet Muhammad cartoon contest, Elton Simpson, 30, logged onto Twitter.
"Follow @_AbuHu55ain," Mr. Simpson posted, promoting a Twitter account believed to belong to Junaid Hussain, a young computer expert from Birmingham, England, who moved to Syria two years ago to join the Islamic State and has become one of the extremist group's celebrity hackers.