ZEUS - NIKE-X OCT 1956 - Released results of study of defense against ICBM. FEB 1957 - Project ZEUS authorized. OCT 1958 - Start of site preparation for Acquisition Radar(ZAR). JUL 1959 - Start of site preparation for Target Track Radar(TTR). AUG 1959 - First firing (winged configuration). APR 1960 - First firing from underground cell. JUN 1960 - Only firing from unported cell. AUG 1960 - First firing (canard configuration). DEC 1960 - First firing with radar control (EMIR). JAN 1961 - Start of site preparation for Discrimination Radar (DR). JUL 1961 - First firing with ZEUS missile track radar control. SEP 1961 - First firing at Pt. Mugu. DEC 1961 - First system test against ballistic target (HERCULES). APR 1962 - First system test with warhead kit against simulated ICBM. NOV 1962 - First system test with 3rd stage jet-head control against simulated ICBM. DEC 1962 - Last firing at Pt. Mugu. JAN 1963 - Now known as NIKE-X. DEC 1963 - Last firing at WSMR. (Total of 72 firings at WSMR and 19 firings at Pt. Mugu.) 1964 - Continued operation of TTR and DR for subsystem 1965 tests and re-entry measurements.