People walk down a ramp to the footprints of the World Trade Center in New York during the fourth anniversary commemoration of the 2001 terrorist attacks, Sunday, Sept. 11, 2005, in New York. Families of the victims placed flowers in two reflecting pools at the site of each tower.
A mourner holds a sign with images shaped to read, "I Love Daddy" Sept. 11, 2005 in New York City.
People embrace at the World Trade Center during the fourth anniversary commemoration of the 2001 terrorist attacks, Sunday, Sept. 11, 2005, in New York. Families of the victims placed flowers in two reflecting pools at the site of each tower.
A woman cries during ceremonies to commemorate the fourth anniversary of the terror attacks, Sunday, Sept. 11, 2005 at the World Trade Center site in New York.
A victim of the 2001 terror attacks on the World Trade Center is remembered during ceremonies to commemorate the fourth anniversary of the attacks, Sunday, Sept. 11, 2005, in New York.
A woman cries as she participates in a memorial service at the World Trade Center in New York, Sunday, Sept. 11, 2005, during the fourth anniversary commemoration of the 2001 attacks. Families of the victims placed flowers in two reflecting pools at the site of each tower.
A member of the New York City Fire Department walks by the reflecting pool overflowing with flowers and images of the deceased in the footprint of the North tower Sept. 11, 2005 in New York City.
Friends and relatives of the victims of the Sept. 11 attacks, react while reading the names of the victims of the 2001 attacks during the September 11th Commemoration Ceremony at the World Trade Center Sunday Sept. 11, 2005, in New York.
A child sits by a reflecting pool at the World Trade Center in New York, Sunday Sept. 11, 2005, during the fourth anniversary commemoration of the 2001 terror attacks. Families of the victims placed flowers in two reflecting pools at the site of each tower.
Flowers cover the reflecting pool on the floor of the site of the former World Trade Center during a ceremony to commemorate the fourth anniversary of the terror attacks on the World Trade Center, Sunday, Sept. 11, 2005, in New York.
A New York City firefighter throws a flower into the reflecting pool on the floor of the site of the former World Trade Center during ceremonies to commemorate the fourth anniversary of the terror attacks on the World Trade Center, Sunday, Sept. 11, 2005, in New York
A woman carries a photograph of a couple at the World Trade Center site in New York, Sunday, Sept. 11, 2005, during the fourth anniversary commemoration of the 2001 terror attacks.
Cindy Droz, center, is comforted by unidentified women, as she weeps in front of her husband's grave, Charles Droz III, a passenger of American Airlines Flight 77, which terrorist crashed into the Pentagon, at Arlington National Cemetery, Sunday, Sept. 11, 2005, in Arlington, Va.
Patrick Hashem, 13, comforts his grandmother Nemra Hashem beside a memorial plaque to Patrick's father and Nemra's son, Peter Hashem, Sunday, Sept. 11, 2005, in Tewksbury, Mass., during dedication ceremonies for a memorial to the victims of the Sept. 11, 2001 terrorist attacks on the World Trade Center in New York. Hashem was onboard American Airlines Flight 11.
Peggy Ogonowski, right, the widow of John Ogonowski, the pilot of American Airlines Flight 11, which crashed into the World Trade Center, and daughters Caroline, 18, left, and Mary, 15, center, attend a flag raising ceremony in front of the Massachusetts Statehouse, Sunday, Sept. 11, 2005, in observance of the fourth anniversary of the Sept. 11 attacks.
Secretary of State Condoleezza Rice greets a New York City police officer after taking part in the ceremonies to commemorate the fourth anniversary of the terror attacks on the World Trade Center, Sunday, Sept. 11, 2005 in New York
On the fourth anniversary of the Sept. 11 terrorist attacks, President Bush, left, and first lady Laura Bush, joined by Vice President Dick Cheney and his wife Lynne Cheney, right, observe a moment of silence on the South Lawn of the White House, in Washington, Sunday, Sept. 11, 2005. They bowed their heads at 8:46 a.m. EDT, the exact minute in 2001 when terrorists smashed the first jetliner into the World Trade Center.
U.S. Attorney General Alberto R. Gonzales lays a wreath at the temporary memorial to Flight 93 in Shanksville, Pa., Sunday, Sept. 11, 2005.
Former New York City Mayor Rudy Giuliani speaks at the September 11th Commemoration Ceremony at the base of the former twin towers of the World Trade Center Sunday Sept. 11, 2005, in New York.
A member of the New York City Fire Department rings a ceremonial bell during the first moment of silence Sept. 11, 2005 in New York City.