Two Airmen assigned to the 4th Aircraft Maintenance Squadron standby as an F-15E Strike Eagle runs through pre-launch checks during exercise Coronet Warrior 17-01, Jan. 31, 2017, at Seymour Johnson Air Force Base, North Carolina. Airmen performed operations while donning various levels of mission oriented protective posture gear in response to different simulated alarms, threats and chemical or biological agents. (U.S. Air Force photo by Airman Shawna L. Keyes)