Chairman of the Joint Chiefs of Staff Adm. Mike Mullen testifies at a hearing of the Senate Armed Services Committee on the new Strategic Arms Reduction Treaty and implications for national security programs at Dirksen Senate Office Building in Washington, D.C., on June 17, 2010. Mullen was joined at the hearing by Secretary of State Hillary Rodham Clinton, Secretary of Defense Robert M. Gates and Secretary of Energy Steven Chu in testimony on the new US-Russia nuclear arms treaty.