U.S. President Barack Obama said Friday the United States will cut the number of its nuclear weapons and reduce their role in national security. "Our forthcoming Nuclear Posture Review will move beyond outdated Cold War thinking and reduce the number and role of nuclear weapons in our national security," Obama said in a statement on the 40th anniversary of the Nuclear Non-Proliferation Treaty. The Obama administration is expected to issue the new nuclear strategic guideline by the end of this month.