HAND-IN-HAND: U.S. President Barack Obama with Prime Minister Manmohan Singh after a joint news conference at the Hyderabad House in New Delhi on Monday.

New Delhi: The United States has become the first nuclear weapons state (NWS) as defined by the Nuclear Non-Proliferation Treaty to endorse the idea of talks between the five NWSs and the three nuclear-armed nations outside the NPT, i.e.