Bengaluru (Karnataka), [India], Dec 10 (ANI): Hindustan Aeronautics Limited-developed Light Utility Helicopter (LUH) has achieved an important milestone of flying at 6 km altitude. The chopper was flown by Chief Test Pilot Wg Cdr. (Retd) Unni K. Pillai and Test Pilot, Wing Cdr (Retd) Anil Bh