A free speech group sponsored an exhibit of cartoons depicting the prophet Muhammad in Garland, Texas, a suburb of Dallas. Predictably, this drew the ire of Muslims, for whom any depiction of their prophet is blasphemous. So two terrorists attacked the exhibit with gunfire, but were killed by police officers. The question is, were these homegrown terrorists, or is there an al-Qaeda or ISIS connection?
UPDATE: ISIS is claiming responsibility.