Two U.S. Marines peer out from a doorway as they maneuver their way through the Military Operations in Urban Terrain facility at Marine Corps Base Camp Lejeune, N.C., on April 22, 1998, during a rehearsal for Urban Warrior. Urban Warrior is a series of Limited Objective Experiments sponsored by the Marine Corps Warfighting Lab. The experimentation will examine the urban tactics of thrust and penetration, the use of man-portable shields and breaching technologies, and new tactical possibilities for hospital corpsmen. These Marines are attached to Bravo Company, 1st Battalion, 8th Marines.