 One of the very interesting features of Indo-USA relations of recent times is the changes on the terms of engagement between the two countries on the issue of nuclear proliferation.While earlier, in the USA strategic thinking on nuclear proliferation, India figured mainly because of American concern about latter's nuclear and missile programmes, in the twenty-first century, however, American strategic thinking on the issue of nuclear proliferation has undergone major reorientation.Now, the Americans are increasingly realising the futility of insisting on a rollback of India's nuclear programme.