U.S. Air Force Airman 1st Class Colin Matz, 633rd Security Forces Squadron entry controller, recovers equipment during water confidence training during the emergency services team tryouts at Joint Base Langley-Eustis, Virginia, June 8, 2018. The EST mission is to combat any terrorist activity, high risk response or high risk activity. (U.S. Air Force photo by Senior Airman Derek Seifert)