Senior Airman Richard Brooke, 28th Munitions Squadron conventional maintenance crew member, assembles an inert guided bomb unit during the a phase II operational readiness exercise at Ellsworth Air Force Base, S.D., Feb. 13, 2014. The intent of the phase II exercise is to evaluate the wing's ability to meet the wartime and contingency tasks of employing forces, sustaining forces and maintaining the ability to survive and operate in a deployed location. (U.S. Air Force photo by Senior Airman Zachary Hada/Released)