U.S. airmen from the 615th Contingency Response Wing Command, Travis Air Force Base, Calif., assemble together prior to the Engine Running On/Offload competition during Air Mobility Rodeo 2011 at Joint Base Lewis-McChord, Wash. on July 25, 2011. The ERO is a timed event intended to simulate and expedite the on/offload of cargo in a wartime environment using a five member team. Rodeo is the U.S. Air Force's and AMC's premier international combat skills and flying operations competition designed to develop and improve techniques, procedures and interoperability, while optimizing international mobility partnerships and enhancing mobility operations.