Airman 1st Class Chance Scharer, 436th Logistics Readiness Squadron, briefs a group of honorary commanders on the petroleum pump house during a tour of the 436th Mission Support Group March 18, 2015, on Dover Air Force Base, Del. The facility moves fuel from large storage tanks to underground delivery stations on the flight line at single-point refueling stations. (U.S. Air Force photo/Greg L. Davis)