The Tejas is the latest indigenous weapon system to enter service, but the DRDO has developed a large variety of sophisticated weapon systems. A range of missiles: the Prithvi, Dhanush, Agni, Akash, Nag, have all been developed in India. New missiles like Astra, LRSAM, MRSAM are in advanced stages of development. Brahmos, the only supersonic cruise missile in the world, is in regular production with enquiries from many countries. Pinaca, a versatile multi-rocket system, has proved its efficacy and is in great demand, too. A range of radars, sonars, torpedoes, UAVs and many other EW/electronic systems have also been developed by DRDO. India still imports 60 per cent of its requirements, however, mostly to meet the immediate needs of the services. But we (the scientific community) strongly believe India can reduce its imports significantly and become an exporting country, if some of the weaknesses in our Aviation & Defence (A&D) ecosystem are corrected.