Nellis Area I has the airfield (2 runways and ramp space for up to 300 aircraft), recreation and shopping facilities, dormitories/temporary lodging, some family housing, "and most of the command and support structures", e.g., Suter Hall for Red Flag. Nellis Area II northeast of the main base "at the foot of Sunrise Mountain" (formerly the U.S. Navy's Lake Mead Base) has Nellis Gun Club and the 820th Red Horse Squadron. Nellis Area III is west of the main base with family housing, administration and industrial areas, and the Mike O'Callaghan Federal Hospital. Area III also includes a munitions response area (MRA XU741) which had World War II storage for small arms ammunition, pyrotechnics, and chemical bombs and that now includes 2 remaining World War II buildings (numbers 1039 & 1047), 5 modern igloos, and RV storage.