NEW DELHI, July 23 -- The Indian Air Force is set to phase out the last of its iconic Mikoyan-Gurevich MiG-21 fighter jets in two months, ending a journey of 62 years, officials aware of the matter said on Tuesday. The fighter jets will be decommissioned at a ceremony planned in Chandigarh on September 19, the officials said, asking not to be named. The air force currently has two MiG-21 squadrons , the No 23 Squadron, better known as "Panthers", and the No 3 Squadron or "Cobras." Both are based at the sprawling Nal desert fighter base near Bikaner. The induction of the MiG-21, India's first supersonic fighter, began in 1963. IAF has operated a raft of MiG-21 variants over the last six decades: Type 74 or MiG 21F, Type 76 or MiG 21PF, Type 77 or MiG 21FL, Type 96 or MiG 21M, Type 75 or MiG 21 Bis (upgraded Type 96) and the MiG-21 Bison. Both squadrons operate MiG-21 Bison, the last variant of the single-engine workhorse. A fighter squadron usually consists of 16 to 18 jets....