Since Aurora shooting, 387 have been killed in 78 U.S. mass murders

On the same day that a 24-year-old Kuwaiti-American named Mohammod Youssuf Abdulazeez apparently killed four Marines in Chattanooga, Tennessee, a jury in Colorado convicted James Holmes, now 27, of the murder of 12 people in an Aurora movie theater in July 2012. Such incidents are, sadly, not nearly uncommon enough. According to a USA Today tally, 387 people have been murdered in 78 mass killings since Holmes' attack on defenseless people trying to peacefully watch a Batman movie; 119 of the vic...