Robert Rayborn inspects a nitrogen cart May 11, 2011, at Travis Air Force Base, Calif. Mr. Rayborn also submitted an idea about the nitrogen tanks to the Zero-Overpriced Program, which resulted in the goverment saving nearly $600,000 in the first six months. Mr. Rayborn is an aerospace ground equipment technician at the 60th Maintenance Squadron. (U.S. Air Force photo/Airman 1st Class Michael Battles)