Explanation:

 India has become the fourth country to have successfully tested the anti-missile system after the US, Russia and Israel. India's BMD programme, launched in the middle of the previous decade, is a two tiered shield system consisting of two interceptor missiles, namely the Prithvi Air Defence (PAD) missile for high altitude interception and the Advanced Air Defence (AAD) missile for lower altitude interception. However, the Indian BMD, mainly focusing to counter missiles with less than 5,000-km range, is still to become operational as further tests of the BMD system are being planned. It is the multiple missile threat defence system called the National Missile Defence (NMD) of the US can shield an entire country against incoming missiles, such as intercontinental ballistic missiles of over 7,500-kilometer range and other shorter range ballistic missiles.