Bush to mark September 11 with moment of silence

President George W. Bush is observing the seventh anniversary of the September 11 terrorist attacks on Thursday at a time when he's having to dispatch more US troops to fight rising violence in Afghanistan, the launch site for al-Qaida's assault on America. Every year since the attacks, Bush has stood in a moment of silence on the South Lawn of the White House to remember the nearly 3,000 people who died when terrorists crashed hijacked airplanes into the World Trade Center in New York, the Pentagon and a field in Shanksville, Pennsylvania. Afterward he was to head to the Pentagon to dedicate a memorial that has 184 benches over small reflecting pools representing each life lost when American Airlines Flight 77 flew into the symbol of US military might on that clear and sunny September morning. The moment of silence at the White House on Thursday will occur at 8:46 a.m. - the exact time in 2001 that terrorists slammed the first of two jetliners into the World Trade Center. The Pentagon was struck about an hour later. Joining the president will be first lady Laura Bush, Vice President Dick Cheney and his wife, Lynne, members of Congress, Cabinet members, military officials and about 3,000 White House employees and guests. The Pentagon ceremony will include a wreath laying, music and a reading of the names of the 184 who died on the plane and inside the building.