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04 Nov 2015: India has Signed for the purchase of S-400 Anti Ballistic Missile. 400 km range. Can save from Air Attack.
An anti-ballistic missile (ABM) is a surface-to-air missile designed to counter ballistic missiles. Ballistic missiles are used to deliver nuclear, chemical, biological or conventional warheads in a ballistic flight trajectory. The term "anti-ballistic missile" is commonly used for systems designed to counter intercontinental ballistic missiles (ICBMs).