NASA intern studies propulsion
U.S. Air Force Maj. David Pabst gives Erik Lopez a tour of the cockpit of a B-52H Stratofortress, May 3, 2013, Barksdale Air Force Base, La. Lopez is a college sophomore studying Aerospace Engineering and is was accepted for an internship at NASA's Johnson Space Center in Houston, Texas. (U.S. Air Force photo by Master Sgt. Greg Steele/Released)