Obama Renews Call for Reduction of Nuclear Stockpiles

Speaking in Berlin, U.S. president says it is possible to ensure American security and deterrence while reducing nuclear weapons; Russia says U.S. missile defense a big barrier to nuclear cuts.

U.S. President Barack Obama called on Wednesday for a one-third reduction of the United States' and Russia's nuclear stockpiles.

Obama spoke at Berlin's iconic Brandenburg Gate, a powerful symbol of the Cold War, saying it's possible to ensure American security and its strong deterrence while also reducing nuclear weapons.

He said he intends to seek negotiated cuts with Russia to move beyond a Cold War nuclear posture.

Obama pledged to work with NATO allies to forge a new international framework for peaceful nuclear power, and added that the United States will hold a summit in 2016 on securing nuclear materials around the world.

The U.S. president also called for a treaty to end production of fissile material.

Following Obama's speech, a senior Russian official said that the U.S. deployment of anti-missile shields was a huge hurdle to any further cuts in the offensive nuclear arsenals of the former Cold War foes, because of concerns the interceptors could shoot down Russian missiles.

"How can we take the idea of strategic nuclear weapons reductions seriously when the United States is building up its ability to intercept these ... weapons?" Deputy Prime Minister Dmitry Rogozin told reporters.