U.S. Air Force Senior Airman Joshua Westbrook, radio technician assigned to the 628th Communications Squadron, clamps down M9 paper for Chemical, Biological, Nuclear Explosives training during Crescent Reach, May 20, 2015. This is a local exercise, which lasted May 18-21, 2015, that tested and evaluated Joint Base Charleston's ability to launch a large aircraft formation in addition to process and deploy duty passengers along with cargo in response to a simulated crisis abroad. (U.S. Air Force photo by Senior Airman Jasmonet Jackson)