By Holly Yan, CNN
President Barack Obama will ask Russia to join the United States in slashing its supply of strategic nuclear warheads by about one-third, a senior administration official said.
Obama will announce the goal during a speech Wednesday in Berlin - a city rife with Cold War history.
The president will also outline his goal to reduce U.S. and Russian tactical nuclear weapons in Europe, the official said. The president hopes to work with NATO allies on proposals toward that goal.
It's all part of Obama's "vision of achieving the peace and security of a world without nuclear weapons," the official said.
"We will seek to negotiate these reductions with Russia to continue to move beyond Cold War nuclear postures," the official added.
Obama's speech will take place almost exactly 50 years after President John F. Kennedy delivered his "Ich bin ein Berliner" - or "I am a Berliner" - speech in the city that was divided by Western and Soviet occupations during the Cold War.FULL STORY