U.S. Secretary of State Hillary Clinton steps to the podium as President Barack Obama introduces her to speak on the New START nuclear arms reduction treaty at the White House in Washington, March 26, 2010. Obama and Russian President Dmitry Medvedev sealed an agreement on Friday on a landmark nuclear arms reduction treaty and will meet to sign it on April 8 in Prague, the White House said. REUTERS/Jim Young (UNITED STATES — Tags: POLITICS MILITARY) — RTR2C45L