In pictures: Americans mourn for 9/11 victims
New York City police bugler Gabe Perdomo warms up while standing next to the South Pool during ceremonies marking the 11th anniversary of the Sept. 11, 2001, terrorist attacks.JUSTIN LANE/Reuters
New York Mayor Michael Bloomberg, left, and 9/11 Memorial and Museum president Joe Daniels listen as a bugler plays Taps at the close of ceremonies marking the 9/11 anniversary.JOHN MOORE/Reuters
U.S. Army Second Lieutenant Michelle Mudge wipes a tear during ceremonies in New York on Tuesday.JOHN MOORE/Reuters
Jillian and Eloy Suarez embrace after ceremonies marking the 11th anniversary of the 9/11 attacks, in which Eloy Suarez was a first responder.JOHN MOORE/Reuters
A relative sports a tattoo of his late family member during ceremonies marking the 11th anniversary of the 9/11 attacks in New York.ERIC THAYER/Reuters
Vincenzo Scibetta is consoled by his father, Charles Scibetta as his mother Adrian Victoria's name is read during New York’s memorial ceremonies.MARY ALTAFFER/Reuters
Khudeza Begum etches the name of her nephew during ceremonies marking the 9/11 anniversary. Ms. Begum, who is from Bangladesh, lost her nephew Nural Miah and his wife, Shakila Yasmin, in the attacks.JOHN MOORE/Reuters
Former president Bill Clinton and Lieutenant Ignatius Carrol, a Miami firefighter, lead the crowd as they observe a moment of silence. Mr. Clinton gave remarks as part of his campaign for President Barack Obama at a grassroots event.ANDREW INNERARITY/Reuters
President Barack Obama, flanked by Defense Secretary Leon Panetta, left, and General Martin Dempsey, Chairman of the Joint Chiefs of Staff, marks the 11th anniversary of the terrorist attacks at the Pentagon, on Tuesday.J. SCOTT APPLEWHITE/The Associated Press
U.S. President Barack Obama and first lady Michelle Obama look at the headstone for the 10 people who died in an Oct. 26, 2009, helicopter crash in Afghanistan, during their visit to Section 60 of Arlington National Cemetery on Tuesday.JASON REED/Reuters
The President and first lady join members of the White House staff during a moment of silence on the South Lawn of the White House in Washington on Tuesday.PABLO MARTINEZ MONSIVAIS/The Associated Press
Twin columns of light illuminated the New York skyline Tuesday night in the annual traditional ceremony to commemorate the World Trade Center attacks.GARY HERSHORN/Reuters
People take part in a sunset yoga session as the Tribute in Light shines over the Brooklyn Bridge on the 11-year anniversary of the Sept. 11 attacks in New York.BRENDAN MCDERMID/Reuters
Flags fly at half mast at Liberty State Park in Jersey City, N.J., while the Tribute in Light takes place.GARY HERSHORN/Reuters