London Telegraph 
Aug 3, 2011
President Barack Obama will attend anniversary ceremonies on September 11 at the three sites where terrorists launched their deadly US attacks a decade ago, the White House said on Tuesday.
“On September 11, 2011, the president and Mrs Obama will join with the rest of the American people in marking the 10th anniversary of a day that we will never forget,” spokesman Jay Carney told reporters.
“The president will participate in commemorations at each of the three locations where we lost so many loved ones: in lower Manhattan, in Shanksville, Pennsylvania, and at the Pentagon.”
New York Mayor Michael Bloomberg said last week that the annual event at the “Ground Zero” site, where the World Trade Center once stood, will be attended by Obama’s predecessor George W. Bush, who was president at the time of the worst terror attacks in US history.
Bush had passed up the opportunity to join Obama at Ground Zero in May in the days after US special forces killed terror mastermind Osama bin Laden.