Search teams combed the area where a Louisiana Army National Guard UH-60 Black Hawk helicopter crashed March 11. The helicopter, which was taking part in an overnight training exercise, disappeared 8:30 p.m., on March 11 near an Eglin Air Force Base, Fla., range. The four soldiers were assigned to 1-244th Assault Helicopter Battalion, Hammond, La. The Marines were attached to the Marine Special Operations Regiment, based at Camp Lejeune, N.C.