A KC-10 Extender lowers its refueling boom to another KC-10 to simulate the transfer of fuel during an ‘Elephant Walk’ exercise Dec. 20 here. Members of the 32nd and 2nd Air Refueling Squadrons as well as members of the 305th and 514th Air Mobility Wings participated in the Employment Defense and Global Engagement exercise, which included mass simultaneous aerial refueling of four KC-10s by four other KC-10s. In all, the exercise involved 12 KC-10s as part of a global strike package exercise designed to demonstrate the capability of the Air Force to assemble a large refueling force.