Spc. T.J. Hayer, a medical technician assigned to the

Spc. T.J. Hayer, a medical technician assigned to the 7th Battalion, 158th Aviation Regiment of the Army National Guard, provides simulated medical attention to Sgt. Ryan Swain’s sucking chest wound during a simulated casualty evacuation scenario as part of Exercise ANGEL THUNDER at Davis-Monthan AFB, Ariz., May 7, 2014. ANGEL THUNDER is a multilateral annual exercise that to supports DoD’s training requirements for Personnel Recovery responsibilities through high–fidelity exercises. Exercise ANGEL THUNDER focuses on scenarios that rescue forces are likely to face in current and future contingencies—increasing their combat readiness across a range of military options. (U.S. Air Force photo by Tech. Sgt. Heather R. Redman/Released)