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Layered defence concept: some architectural options for an expanding Ballistic Missile shield

Over the years the basic aims and objectives of the US missile defence shield have witnessed considerable modifications and enlargement. The present emphasis is on developing the ‘multilayered defence’ concept that encompasses all the three major phases of an attacking ballistic missile. It is not difficult to foresee that the layered defence concept is but a step towards evolving worldwide security architecture of the future that will obviously have major strategic implications globally.