The 15-member council while urging 'other states' outside the NPT to join the controversial treaty as non-nuclear states to help rid the world of atom bombs also urged all countries to sign and ratify the Comprehensive Test Ban Treaty and refrain from conducting atomic tests. India has not signed the CTBT yet.
The 'other states', which were not named in the landmark resolution, were a clear reference to Pakistan and India, which have not signed the NPT but are known to have atomic arsenals, and Israel, which neither confirms nor denies having nuclear arms but is believed to have a sizeable stockpile of warheads.
The resolution also calls for talks on drafting a treaty to ban the production of fissile material for nuclear weapons.
The mandate of the council came when it approved the resolution 1887, which calls on countries that have not signed the nuclear the Non-Proliferation Treaty "to comply fully with all their obligations."
Obama said the resolution will strengthen the NPT. "We have made it clear that the Security Council has both the authority and responsibility to respond to violations of this treaty," he said.
"Nations with nuclear weapons have the responsibility to move towards disarmament and those without them have the responsibility to forsake them," Obama said.
The resolution declared that the NPT remains the cornerstone of the nuclear non-proliferation regime.
The resolution calls for stepped up efforts to prevent the spread of nuclear weapons, promote disarmament and "reduce the risk of nuclear terrorism. It was only the fifth time the Security Council met at summit level since the UN was founded in 1945. And Obama was the first American president to preside over a Security Council summit, gaveling the meeting into session and announcing that "the draft resolution has been adopted unanimously."
Obama also made a reference to the apparent delay by the US Senate to ratify the CTBT. "We will move forward with the ratification of the Comprehensive Test Ban Treaty and open the door to deeper cuts in our own nuclear arsenals," he said.
"In America I promise that we will pursue a new agreement with Russia to substantially reduce our strategic war heads and launches," the US President said.
UN Secretary-General Ban Ki-moon hailed the summit leaders for the resolution saying, "This is a historic moment, a moment offering a fresh start toward a new future."
"Although we averted a nuclear nightmare during the Cold War, we now face proliferation of a scope and complexity that demands new strategies and new approaches," Obama told the summit.
"Just one nuclear weapon exploded in a city, be it New York or Moscow, Tokyo or Beijing, London or Paris, could kill hundreds of thousands of people," the president said.
The Security Council endorsed an effort to lock down all vulnerable nuclear materials within four years. The council also reaffirmed "their obligations in relations to arms control and disarmament and to prevent proliferation in all its aspects of all weapons of mass destruction."
