the area's Integrated Fire Control (IFC) sites (16 sites for MIM-14 Nike-Hercules missiles until 1968). The DC had High Frequency Crosstell communication with the 1959–1966 Semi-Automatic Ground Environment (SAGE) Master Direction Center at Norton Air Force Base (DC-17) for coordinating Army intercepts of targets penetrating through the larger USAF Los Angeles Air Defense Sector defended by fighter aircraft. History During the Korean War, the fort's L-43 Lashup Radar Network site provided radar surveillance for the area from 1950 to 1952. The 669th Radar Squadron was assigned to the fort on January 1, 1951. On February 16, 1960, Lt Col James L McCallister was the Missile Director for the defense area. The Fort MacArthur Direction Center began in 1960 with an AN/FSG-1 computer that was the last of 10 installed and which replaced an Interim Battery Data Link (IBDL). The Army dedicated the DC's Missile Master bunker with an Antiaircraft Operations Center ("Blue Room") on December 14, 1960, prior to the USAF/FAA ARSR-1C radar opening in 1961 at San Pedro Hill Air Force Station. Fort MacArthur's 47th Artillery Brigade operated the DC, and the vacuum tube AN/FSG-1 was replaced on January 31, 1967, with a solid-state Hughes AN/TSQ-51 Air Defense Command and Coordination System. On November 15, 1968, the 19th Artillery Group (Air Defense) replaced the 47th Artillery Brigade in command of the DC and its batteries. The 19th Group deactivated July 1, 1974, after Project Concise ended Nike operations. The tennis courts next to the bunker remain at the former site of the AADCP's building 554, and the Missile Master nuclear bunker (building 550) was razed . Rundown of the fort In 1975 Fort MacArthur became a sub-post of Fort Ord, and the Army transferred ownership of the fort's Upper and Lower Reservations to the City of Los Angeles two years later. The Lower Reservation was cleared off and dredged and is now the city's Cabrillo Marina. Fort MacArthur's remaining Middle Reservation was transferred to the United States Air Force in 1982 for use by Los Angeles Air Force Base for administration and housing. In 1989, Madonna filmed some portions of her "Like a Prayer" video there. Angels Gate Park The Upper Reservation is now a city park: San Pedro's Angels Gate Park, home of the Korean Bell of Friendship. Hostelling International USA (part of Hostelling International) maintained a 57-bed youth hostel in the refurbished military barracks of the reservation.