April 8, 2010: Obama visits Prague to sign the New START treaty with Russian President Dmitry Medvedev, a pact hailed as the biggest nuclear arms reduction treaty in a generation.
Obama shares his dream of a nuke free world before a spirited crowd in Prague.
Obama, with Medvedev (left) and Czech Republic President Vaclav Klaus at the Prague Castle.
Obama and Medvedev sign the treaty.
Obama and Medvedev at a post-signing news conference at Prague Castle.
Reporters watch Obama on Television.