U.S. Air Force Reserve Capt. Casey Stedman, a navigator with the 773rd Airlift Squadron, poses is front of a Youngstown C-130H Hercules aircraft here. Stedman will spend four months in a geodesic dome, beginning March 28, 2014, as the mission commander for Hawai'i Space Exploration Analog and Simulation's (HI-SEAS) mission two, The mission is designed to simulate a long-term manned mission to Mars. Stedman is part of a six-person team. (U.S. Air Force photo/Master Sgt. Bob Barko, Jr.)