Orlando Police officers direct family members away from a fatal shooting at Pulse Orlando nightclub in Orlando, Fla., Sunday, June 12, 2016.
Orlando Police officers direct family members away from a fatal shooting at Pulse Orlando nightclub in Orlando, Fla., Sunday, June 12, 2016. Phelan M. Ebenhack AP
Orlando Police officers direct family members away from a fatal shooting at Pulse Orlando nightclub in Orlando, Fla., Sunday, June 12, 2016. Phelan M. Ebenhack AP

These were the worst mass shootings in U.S. history — until today

June 12, 2016 09:00 AM