US President Barack Obama has underlined his administration?s commitment to strengthen the NPT regime and seek the Congressional approval of the CTBT, ahead of a key nuclear summit here next month.

On the occasion of the 40th anniversary of the Nuclear Non-Proliferation Treaty (NPT), the US President and his Secretary of State Hillary Clinton reaffirmed their resolve
to lead the world?s effort to renew and revitalise the landmark NPT agreement.

They also underlined the administration's determination to seek the Congressional ratification of the Comprehensive Test Ban Treaty (CTBT).

World leaders from across the globe, including Prime Minister Manmohan Singh, are expected to participate in the April 12-13 nuclear summit convened by Obama here.