NEW YORK (AP) - The 12th anniversary of the Sept. 11 attacks began with a solemn bell toll and a moment of silence at the World Trade Center site.
The moment of silence at 8:46 a.m. Wednesday marked when the first plane hit the twin towers on a clear, sunny day in 2001. Then, families of the victims started reading aloud the names of those who died.
Christina Aceto read the name of her father, Richard Anthony Aceto. She says she misses her father every day.
A second bell tolled at 9:03 a.m. to mark when the second plane hit the twin towers. Then the reading of the names resumed.
Former Mayor Rudy Giuliani and former Gov. George Pataki attended, as well as Mayor Michael Bloomberg, Gov. Anthony Cuomo and New Jersey Gov. Chris Christie.
President Barack Obama marked the 12th anniversary of the Sept. 11 attacks with a moment of silence on the South Lawn of the White House.
Obama, along with first lady Michelle Obama, Vice President Joe Biden and wife Jill Biden, walked out of the White House at 8:46 a.m. They bowed their heads to observe a moment of silence, which was followed by a bugler playing taps.
Dozens of White House staff joined the Obamas and Bidens on the South Lawn to observe the anniversary.
They then attended a Sept. 11 ceremony at the Pentagon. President Obama also plans to mark the anniversary by participating in a volunteer project.
In Shanksville, PA, the names of passengers and crew aboard United Flight 93 were read aloud by relatives and bells tolled in their honor.
Amid a gentle breeze Wednesday, more than 200 people at the Flight 93 National Memorial heard the names of the 33 passengers and seven crew members who died in the crash.
Flight 93 was traveling from Newark, N.J., to San Francisco on Sept. 11, 2001, when it was hijacked with the likely goal of crashing it into the White House or Capitol.
As passenger Todd Beamer issued the rallying cry "Let's roll," he and several fellow passengers rushed down the airliner's aisle to try to overwhelm the hijackers after learning of the coordinated attacks on the World Trade Center and the Pentagon.
The 9/11 Commission concluded that the hijackers downed the plane as the hostages revolted.