In October last year, India had gone ahead with signing the $5.43 billion deal with Russia for five S-400 Triumf missile shield systems. The game changer S-400 ‘Triumf’ long-range air defence missile system has the capability to destroy incoming hostile aircrafts, missiles and even drones at ranges of up to 400 km. Only Russia and the US have such long range modern air defence system. Each system of S-400 includes a command and control centre, a 3D phased array acquisition radar, optional tracking radar and firing units with associated multi-mode engagement radar. Experts claim that the acquisition radar can not only detect and track up to 300 targets within a distance of 600km but also can engage 36 targets at one point.