Republican presidential hopeful and former New York Mayor Rudolph Giuliani, center, stands with wife Judith, second from left, and victims’ relatives at the World Trade Center site reflecting pool. (Justin Sullivan / Getty Images)
From left, Sara, Kelly and Alicia Casilio from the performance art group Triiibe protest the Iraq war at ground zero. (Timothy A. Clary AFP/Getty Images)
John Whalen of Cohoes, N.Y., visits a World Trade Center exhibit, which includes the Fire Department of New York’s Engine No. 6, an early responder to the scene on Sept. 11, 2001. (Mike Groll / AP)
A crowd gathers near ground zero. (Oded Balilty / AP)
New York firefighters salute during a moment of silence at 8:46 a.m., the time the first plane struck the World Trade Center. (Mario Tama / Getty Images)
A man wrapped in a U.S. flag looks down at the ground zero site in New York. (Oded Balilty / AP)
A photo of the World Trade Center towers hangs on the fence surrounding the site where they stood. (Timothy A. Clary AFP/Getty Images)
A picture of Shai Levinhar, who was killed in the attacks, also hangs on the fence. (Chris Hondros / Getty Images)
President Bush, with First Lady Laura Bush, Vice President Dick Cheney and Lynne Cheney to his left, arrives for a moment of silence outside the White House. (Karen Bleier AFP/Getty Images)
An American flag hangs on the side of the Pentagon near where it was struck in the Sept. 11 attacks. (Brandan W. Schulze / U.S. Navy via Getty Images)
A memorial made by family and friends of victims marks the crash site of United Flight 93 in Shanksville, Pa. (Gene J. Puskar / AP)
