TRAVIS AIR FORCE BASE, Calif. --Senior Master Sgt. Timothy Nichols (left), flight engineer evaluator, discusses fuel consumption with Tech. Sgt. Francisco Guerrero-Vasquez, flight engineer, on the flight deck of a C-5B Galaxy on a Pacific channel mission. Both Air Force Reserve aviators are assigned to the 312th Airlift Squadron, Travis Air Force Base, Calif. (U.S. Air Force photo/Lt. Col. Robert Couse-Baker)