Yellow smoke marks the landing zone for an MV-22B Osprey from Marine Medium Tiltrotor Squadron 263 (Reinforced), 22nd Marine Expeditionary Unit, for a simulated medical evacuation during a Helicopter Assault Course training evolution near Camp Buehring, Kuwait, Sept. 3, 2009. The 22nd MEU is ashore in Kuwait conducting sustainment training while serving as the theater reserve force for U.S. Central Command.