Cut nuke arms by up to third

US President Barack Obama yesterday called on Russia to agree strategic nuclear weapons cuts of up to a third and to also rein in strategic atomic arms.
In a keynote speech in Berlin, Obama also said he would lead two new Nuclear Security summits in his second term.
"These are steps we can take to create a world of peace with justice," Obama said, addressing thousands at the city's iconic Brandenburg Gate.
Under the new Strategic Arms Reduction Treaty negotiated with Moscow during Obama's first term, the two former Cold War foes cut strategic nuclear weapons stocks to the 1,550 level.A one-third cut in the arsenals would take them to the 1,000 weapons mark.
Russia has previously resisted cuts to the number of tactical nuclear weapons stationed in Europe, and President Vladimir Putin said ahead of Obama's speech that Russia will not allow an imbalance in strategic nuclear deterrence.
A top Kremlin aide also said Russia wanted other states to commit to nuclear cuts.
Obama has made cutting nuclear weapons stocks a centrepiece of his political legacy and is in theory committed to eradicating them all together.
Obama also pledged that the United States "will do more" to tackle the threat of climate change and said the world must do likewise before it is too late.
"Our generation must move towards a global compact to confront a changing climate before it is too late, that is our job, that is our task," Obama said in a speech in Berlin.
Speaking on a blistering hot day at Brandenburg Gate, Obama said that "peace with justice means refusing to condemn our children to a harsher, less hospitable planet".
He said the United States had also doubled renewable energies, boosted fuel efficiency in cars and brought down carbon emissions, but added: "We know we have to do more and we will do more."