this time period, SAC's fighter escort wings were transferred to Tactical Air Command (TAC) during 1957 and 1958. Finally, during January 1958's Exercise Fir Fly, SAC "faker" aircraft (twelve B-47s) simulated bombing strikes against metropolitan areas and military installations in the United States defended by Air Defense Command's 28th Air Division. Nuclear missiles, aircrew readiness, airborne alert, and strategic reconnaissance After SAC's 1st Missile Division was activated on 18 March 1957, SAC HQ established the Office of Assistant CINCSAC (SAC MIKE) at the Air Force Ballistic Missile Division in California on 1 January 1958. SAC MIKE was responsible for missile development liaison, the intermediate range Jupiter and Thor missiles having been transferred to SAC for alert in 1958. Beginning on 1 February 1958, a SAC Liaison Team was also located at the NORAD Command Post at Ent AFB, Colorado, and the two commands agreed that direct land line communications should connect SAC bases with NORAD's Air Defense Direction Centers. Also in the late 1950s, SAC continued to enhance its intelligence collection activities and develop innovative means of improving the survivability of its forces to surprise attack. From 1958–, a SAC Detachment (TUSLOG Det 50) operated at Incirlik AB, Turkey, monitoring Soviet missile telemetry from the Kapustin Yar and Tyuratam launch complexes, while in 1959, SAC's Operation Big Star studied, prototyped and evaluated the potential of deploying of Minuteman I ICBMs on civilian railroad tracks via USAF-operated locomotives and trains. President Eisenhower approved the first Atlas ICBM launch by a SAC crew for 9 September 1959 at Vandenberg AFB. While missile operations continued to ramp up, robust training for flight crews to ensure survivability for strike missions also continued. In some instances SAC bombers would oppose ADC fighter-interceptors simulating Soviet interceptors. Conversely, SAC assisted ADC readiness by simulating Soviet bomber threats to the continental United States that ADC fighters would respond to. However, following a mid-air collision between an ADC F-102 and a SAC B-47 during a 17 December 1959 Quick Kick exercise, simulated NORAD fighter attacks were prohibited against SAC bombers. On 18 March 1960, SAC intercontinental missiles began alert at Maine's Snark Missile Launch Complex adjacent to Presque Isle AFB. The following month, on 22 April 1960, SAC turned over the last British-based PGM-17 Thor IRBM to the Royal Air Force. This was soon followed by SAC's first Titan I ICBMs at Lowry AFB's Titan I Missile Complex 1A