Raven’s Challenge X program manager John Simpson briefs participants and advisors at Fort Wolters, Texas, April 20, 2016. Raven’s Challenge brought together explosive ordnance disposal technicians from the U.S. Air Force; U.S. Army; ATF; FBI; and local law enforcement to merge resources and perform counter-IED operations together in real-world scenarios. (U.S. Air Force Photo/Steve Warns/Released)