New Delhi [India], June 3 (ANI): In a major boost to strengthen the long-range air defence capabilities of the country, the fourth squadron of the S-400 Sudarshan air defence systems reached India from Russia a few days ago. The S-400 Sudarshan long-range air defence system from Russia reached India on a ship and will be deployed in the operational area very soon, defence sources told ANI. The S-400 air de