What year did Pakistan sign an agreement with China for their assistance in building nuclear power plants ?
India was among the few countries to have a no first use policy , a pledge not to use nuclear weapons unless first attacked by an adversary using nuclear weapons , however India 's NSA Shivshankar Menon signaled " a significant shift from " no first use " to " no first use against non-nuclear weapon states "" in a speech on the occasion of Golden Jubilee celebrations of the National Defence College in New Delhi on October 21 , 2010 , a doctrine Menon said reflected India 's " strategic culture , with its emphasis on minimal deterrence " .