U.S. Air Force Airman 1st Class Jeremy Parnell, 8th Security Forces Squadron member, fires his M- 249mm Squad Automatic Weapon from the cover of his turret during a field training exercise at Kunsan Air Base, Republic of Korea, March 17, 2017. Opposing forces attack the security forces members to test their team work and communication skills under stressful situations. (U.S. Air Force photo by Senior Airman Colville McFee/Released)