$ 0 0 The emblematic MiG-21 FL that introduced supersonic jets to Indian Air Force 50 years ago flew intohistory here on Wednesday when two pairs of MiG-21 FLs roared off a runway at the Kalaikunda air base at 9.45am for the last time. It began with Flt Lt Nagarajan handing over a document to "Charlie Browne". Flt Lt Nagarajan (27) is the youngest IAF pilot to have completed training on MiG-21 FL this year. And Charlie Browne used to be the call sign of Air Chief Marshal NAK Browne who retires on December 31 this year, aged 62. Decades ago, Browne, too, had graduated to flying supersonic fighters on MiG-21. It was thus an emotional moment for both. The document officially announced that the MiG-21 FL (also called the Type-77), an aircraft that served IAF for a glorious 50 years, was flying intohistory pages. The MiGs were also decried as flying coffins for the number of crashes in which scores of pilots lost their lives. There were widespread demands to phase the fighter out which had clearly outlived its utility. Browne said MiG-21s maneuverability couldn't be matched by any modern-day fighter, the reason why it was the combat backbone of the IAF for 50 years. Nearly 1,000 aircraft (several variants) were inducted by the IAF and comprise 60% of the fleet.