was re-designated as the 4477th Test and Evaluation Squadron and the operation was renamed again to Constant Peg. The squadron developed realistic combat training operations featuring adversary tactics, dissimilar air combat training, and electronic warfare. Planes kept coming in from other sources as well. No less than three Cuban pilots brought their MiGs to Florida. A number of Chinese made MiGs were purchased outright from China via the front company Combat Core Certification Professionals Company (CCCP!) and imported in crates. Three Syrians flew their MiG-23 and MiG-29s to Turkey in 1988. Over the course of its history U.S. test pilots flew several models of Soviet-designed MiGs. Mikoyan-Gurevich MiG-17 were a subsonic, early jet aircraft design. Though originally meant to counter American bombers of the 1950s and 1960s, durable, cigar-shaped MiG-17s became North Vietnam's primary fighter and eventually served in at least 20 air forces worldwide. MiG-17s were designated as: YF-113A Soviet MiG-17F NATO:"Fresco-C" used in HAVE DRILL program YF-113C Chinese J-5 used in HAVE PRIVILEGE program YF-114C Soviet MiG-17F NATO:"Fresco-C" used in HAVE FERRY program YF-114D Soviet MiG-17PF NATO:"Fresco-D" (Serial: 75-008) Shenyang J-6 (J-6/Jianjiji-6 (Fighter Aircraft, Type 6)/F-6 (Export model) Farmer, is a 30mm gun Chinese license built version of the Mikoyan-Gurevich MiG-19, Russia's first supersonic interceptor. While the USSR produced less than 2,000 MiG-19s, later discarding it in favor of the MiG-21 due to excessive accidents, the Chinese endorsed the aircraft, fixed the reliability problems and built over 3,000 of them; more than any other nation. J-6s were exported to North Vietnam at the end of Operation Rolling Thunder which ended in 1968, but saw extensive aerial combat during operations Linebacker and Linebacker II in 1972. The J-6 made its first flight in 1959 and went into production in 1963. Six primary models were produced: Shenyang J-6 (F-6) Farmer-C Tactical Fighter J-6A (F-6A) Farmer-B Interceptor J-6A Farmer-B W/Missiles Nanchang J-6B Farmer-D Interceptor W/Missiles Shenyang J-6C Farmer-C Tactical Fighter Shenyang J2-6 (FR-6) Farmer-C Tactical Reconnaissance Fighter Pakistan was the first and largest customer of the J-6 (F-6) receiving nearly 300 aircraft, mostly of the J-6C (F-6C) variety. There were few external differences between the earlier MiG-19 and J-6 models. Later J-6 models had their pitot tubes positioned on the right side of the fuselage forward of the cockpit and a bullet-shaped fairing which contained the brake parachute positioned under the aircraft's fin. Mikoyan-Gurevich MiG-21 were cone-nosed, supersonic fighters that were