In a move that could reshape the balance of power, India is set to ink a monumental $4 billion deal with Russia. New Delhi plans to secure Moscow's cutting-edge Voronezh radar system, an early-warning sentinel poised to transform India's air defence capabilities. As tensions simmer in the skies and seas of Asia and the Indian Ocean, this system promises to be a game-changer in detecting threats far and wide. NDTV's Gaurie Dwivedi tells you more