U.S. Marine Corps Lance Cpl. Mykel Thaete, Advanced Infantry Training Battalion (AITB), School of Infantry West (SOI-W) detachment Hawaii, runs for concealment after popping a M18 green smoke hand grenade on Kahuku Training Area, Oahu, Hawaii, May 19, 2010. Thaete participated as opposition force in an attack and defend field exercise as part of SOI-W detachment's AITB's Infantry Squad Leader Course.