The first Douglas Nike Ajax knocked out a target drone in November 1951. It was the first operational ground-based supersonic anti-aircraft in the United States and was deployed at sites in a circular pattern around key American industrial and military locations. The first Los Angeles, Calif., area Nike Ajax battery was positioned in the mountains above Malibu in 1954. Nike missiles were launched from a self-contained launch area, and each site had two or three launching platforms. The missiles, stored underground on rails, were brought to the surface by elevators. Once on the surface, they were pushed on rails to an erector and raised to an angle of about 85 degrees for firing. The Nike missiles used the "command guidance" system, in which the major control equipment was ground based and not part of the expendable missile. A control area, at least 1,000 yards from the launch area, contained separate radars that simultaneously located and tracked both the target and the Nike missile and guided the missile to the target. All existing U.S. Nike batteries were inactivated Feb. 4, 1974.