U.S. Army Maj. Jason Engelbrecht, Joint Task Force-Civil Support future operations planner, receives his assigned radio frequency during exercise Vibrant Response 15 at Fort Eustis, Va., April 30, 2015. The exercise promotes the realistic integration of chemical, biological, radiological and nuclear response units in response to CBRN events. (U.S. Air Force photo by Senior Airman Kimberly Nagle/Released)