India prepares to acquire additional Russian S-400 air defence missiles, strengthening its aerial firepower. Discussions with Russia are underway, and the proposal is expected for approval soon. Plans also include more squadrons and advanced air-to-air missiles. India prepares to acquire additional Russian S-400 air defence missiles, strengthening its aerial firepower. Discussions with Russia are underway, and the proposal is expected for approval soon. Plans also include more squadrons and advanced air-to-air missiles.