In two years from now, the Indian Air Force's frontline Sukhoi-30 fighters may be re-armed with Israeli Derby air-to-air missiles after the jet's Russian-made R-77 missiles were found wanting in air combat operations over the Line of Control on February 27 this year. Sources in the Indian Air Force told NDTV, "We already have the missile as part of the SPYDER (Surface-to-Air Missile) system. Integration (with the IAF's Su-30s) is the next step.''