170310-F-VJ538-0014
Air Commandos from the 1st Special Operations Security Forces Squadron and the 1st Special Operations Civil Engineer Squadron navigate the inside of a building during an active shooter exercise at Hurlburt Field, Fla., March 10, 2017. The Air Force Research Laboratory and the National Security Innovation Network sponsored a capstone project at the University of Colorado Denver that focused on indoor communication and navigation problems for first responders. (U.S. Air Force photo/Senior Airman Krystal M. Garrett)