The site of the Sept. 11, 2001 terrorist attacks is seen through an American flag hanging in the Trinity Church cemetery Sept. 11, 2008 in New York City. This marks the seventh anniversary of the attacks on the World Trade Center.
New York
Cazzandra Peterson tosses a rose into the reflecting pool in memory of her father William who died in the Sept. 11 World Trade Center attacks, during the seventh anniversary commemoration ceremony of the event in New York, Thursday, Sept. 11 2008.
Pentagon
People walk through a flag memorial at the Pentagon during a ceremony marking the seventh anniversary of the Sept. 11 attacks on the Pentagon and World Trade Center, Thursday, Sept. 11, 2008.
Shanksville, Pa.
Visitors to the temporary Flight 93 memorial in Shanksville, Pa., participate in a sunrise memorial on Thursday, Sept. 11, 2008.
New York
Roses for the ceremony marking the seventh anniversary of the attacks on the World Trade Center are ready for the family of the victims, Thursday, Sept. 11, 2008, in New York. Moments of silence were planned to mark the times that two hijacked jetliners crashed into the twin towers, along with the moments that the buildings collapsed.
New York
On the seventh anniversary of the attack on the World Trade Center, a family member of a victim pays respect at the site of the former twin towers during a commemoration ceremony in New York, Thursday Sept. 11, 2008.
Washington
Seven years after the Sept. 11 terrorist attacks, President Bush, first lady Laura Bush, Vice President Dick Cheney, his wife Lynne, and members of the White House staff observe a moment of silence on the South Lawn of the White House in Washington, Thursday, Sept. 11, 2008.
Shanksville, Pa.
A visitor to the temporary Flight 93 memorial in Shanksville, Pa., pauses on Thursday, Sept. 11, 2008, at the angels that represent each of the 33 passengers and seven crew members who lost their lives in Shanksville seven years ago.
New York
A firefighter holds a picture of a fallen comrade, a victim of the Sept. 11 terrorist attacks, before the start of a memorial ceremony Thursday, Sept. 11, 2008 in New York. Throngs of family members of victims and others gathered in lower Manhattan for the annual ceremony.
Pentagon
People listen to the reading of the names of those who died during the Sept 11 attacks, Thursday, Sept. 11, 2008, during a memorial service at the Pentagon.
New York
Mourners pay their respects to the victims of the Sept. 11 terrorist attacks at the World Trade Center site in New York Thursday, Sept. 11, 2008.
New York
A woman holds flowers and a photo as she waits for the start of the seventh anniversary of the Sept. 11 attacks commemoration ceremony held at Zuccotti Park in New York, Thursday, Sept. 11, 2008.
Pentagon
A bugler plays taps and rescue personnel salute over an American flag hanging on the wall of the Pentagon where it was hit in the Sept. 11 attacks, Thursday, Sept. 11, 2008, during a memorial service on the seventh anniversary of the attacks.
New York
Arthur Russo holds a picture of his son Wayne, as he arrives for the ceremony marking the seventh anniversary of the attacks on the World Trade Center, Thursday, Sept. 11, 2008 in New York.
Pentagon
A U.S. Navy sailor rings a bell as the name of each person lost at the Pentagon is read during the Pentagon Memorial dedication ceremony Sept. 11, 2008. The national memorial consists of 184 inscribed memorial units honoring the 59 people aboard American Airlines Flight 77 and the 125 in the building who lost their lives Sept. 11, 2001.
Boston
United Airlines employee Gary Covitz pauses Thursday, Sept. 11, 2008, in Boston at a memorial to passengers and crew killed on hijacked planes that flew from Logan International Airport and crashed into the World Trade Center towers on Sept. 11, 2001. Covitz was a co-worker of Marianne MacFarlane, who died on United Flight 175. At right is a panel of names for those killed on American Airlines Flight 11.
New York
Presidential candidates Sen. John McCain (R-Ariz.), left, and Sen. Barack Obama (D-Ill.) toss flowers into the reflecting pool at ground zero to commemorate the seventh anniversary of the Sept. 11 terrorist attacks Thursday, Sept. 11, 2008, in New York.
Afghanistan
A U.S. soldier pays tribute during a ceremony marking the seventh anniversary of the Sept. 11 attacks, at Bagram airbase north of Kabul, Afghanistan, Thursday, Sept 11, 2008. U.S. troops in Afghanistan remembered those killed in the Sept. 11 attacks during a ceremony Thursday at the American base in Kabul, where a top U.S. general said terrorism still remains a threat to the world.
Baghdad
A U.S. Army soldier is seen at a ceremony to mark the seventh anniversary of the September 11 terrorist attacks at Camp Liberty in Baghdad on Thursday, Sept. 11, 2008.
New York
A short test of the "Tribute in Light" illuminates the sky over the World Trade Center site Wednesday, Sept. 10, 2008 in New York. The Tribute in Light will be turned on for the evening of Thursday, Sept. 11, in honor of those who lost their lives seven years ago in the terrorist attacks on the United States.