Maj. Gen. Eric W. Crabtree, commander, 4th Air Force, departs from the 4th Air Force Headquarters building parking lot at the beginning of a farewell ride at March Air Reserve Base, Calif., March 9, 2011. Members of 4th Air Force organized the ride as a way to say goodbye to General Crabtree, who will be taking a new assignment at the Defense Threat Reduction Agency, Ft. Belvoir, Va.