'Cut nukes by a third'

US President Barack Obama has called for the world's nuclear stockpiles to be reduced by a third.

He spoke yesterday at Berlin's iconic Brandenburg Gate, a powerful symbol of the Cold War.

Obama said it was possible to ensure US security and a strong deterrent and also reduce nuclear weapons.

He intended 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.

He said the US would hold a summit in 2016 on securing nuclear materials around the world.