President Barack Obama called on Russia to partner with the United States in its effort to reduce the world's nuclear stockpiles.
During a speech in Germany Wednesday he said the two nations should embrace the spirit that Berlin displayed when it fought to reunite during the Cold War.
"We may no longer live in fear of global annihilation, but so long as nuclear weapons exist, we are not truly safe," Obama said.
"After a comprehensive review, I've determined that we can ensure the security of America and our allies -- and maintain a strong and credible strategic deterrent -- while reducing our deployed strategic nuclear weapons by up to one-third," he continued.
"And I intend to seek negotiated cuts with Russia to move beyond Cold War nuclear postures," he said.
The president also renewed his call to tackle climate change, calling it the "global threat of our time."
"With a global middle class consuming more energy every day, this must now be an effort of all nations, not just some," the president said.
"For the grim alternative affects all nations - more severe storms, more famine and floods, new waves of refugees, coastlines that vanish, oceans that rise," he warned. "This is the future we must avert."