Staff Sgt. David Ramirez, 379th Expeditionary Logistic Readiness fuels laboratory, extracts a sample of jet petroleum 8 from a pipeline which supplies the aircraft here August 19, 2015 at Al Udeid Air Base, Qatar. The base fuels laboratory at Al Udeid tests all petroleum that is used in aircraft, vehicles and generators throughout the installation to safeguard its quality, performance and safety. (U.S. Air Force photo/ Staff Sgt. Alexandre Montes)