Airman 1st Class Matthew Sinnemaki, 28th Logistics Readiness Squadron vehicle operator, presses the door release on a shuttle while making a stop at the 28th Bomb Wing Headquarters during a Phase II operational readiness exercise at Ellsworth Air Force Base, S.D., July 12, 2013. Sinnemaki and other vehicle operators transported exercise participants to and from the Pride Hangar and other locations across the simulated deployed environment. (U.S. Air Force photo by Airman 1st Class Ashley J. Thum/Released)