Capt. Justin Toney, 20th Space Control Squadron flight commander, announces over the public announcement system to go into ‘lockdown’ during active shooter training at site C-6 Eglin Air Force Base, Fla., June 27. Walton County Sheriff’s deputies and first responders from Eglin participated in the joint exercise practicing their ability to respond and work as a team. (U.S. Air Force photo/Kristin Stewart)