U.S. President George W. Bush and first lady, Laura Bush, are joined by Vice President Cheney and his wife, as they join senior White House staff members on the South Lawn of the White House for a moment of silence to honor the 7-year anniversary of the attacks on the United States on Sept. 11, 2001 in Washington, September 11, 2008. REUTERS/Larry Downing (UNITED STATES)