Putin India Visit, Dec. 4 -- The Russian-made S-400 air defence system proved decisive during India's Operation Sindoor earlier this year. The Indian Air Force hailed the S-400 - a cutting-edge surface-to-air missile platform - as the 'game-changer' of the three-day confrontation.

Now, with Russian President Vladimir Putin set to arrive in India today, New Delhi is setting its sights on the S-400's bigger, stronger, and smarter successor: the S-500 Prometheus air shield.

India's keenness in procuring S-400 missile systems, upgrading Sukhoi 30 fighter jets, and purchasing other critical military hardware from Russia will be on the agenda for talks between Defence Minister Rajnath Singh and his Russian counterpart, Andrey Belousov, on Thu...