Fuels laboratory
Senior Airman Jeff Simmons measures ether in a bottle to check for impurities in JP-8 jet fuel Monday, March 20, 2006, at MacDill Air Force Base, Fla. Airman Simmons runs sample tests to ensure fuels are in compliance with Air Force standards and have no additives that could damage an aircraft. Airman Simmons is a fuels lab technician with the 6th Logistics Readiness Squadron. (U.S. Air Force photo/Airman 1st Class Bradley A. Lail)