Home A woman touches a carnation left on a name inscribed into the North Pool during 9/11 Memorial ceremonies marking the 12th anniversary of the 9/11 attacks on the World Trade Center in New York on September 11, 2013 in New York City. (Photo by Adrees Latif-Pool/Getty Images) A woman touches a carnation left on a name inscribed into the North Pool during 9/11 Memorial ceremonies marking the 12th anniversary of the 9/11 attacks on the World Trade Center in New York on September 11, 2013 in New York City. (Photo by Adrees Latif-Pool/Getty Images)

A woman touches a carnation left on a name inscribed into the North Pool during 9/11 Memorial ceremonies marking the 12th anniversary of the 9/11 attacks on the World Trade Center in New York on September 11, 2013 in New York City. (Photo by Adrees Latif-Pool/Getty Images)

NEW YORK, NY – SEPTEMBER 11: A woman touches a carnation left on a name inscribed into the North Pool during 9/11 Memorial ceremonies marking the 12th anniversary of the 9/11 attacks on the World Trade Center in New York on September 11, 2013 in New York City. The nation is commemorating the anniversary of the 2001 attacks which resulted in the deaths of nearly 3,000 people after two hijacked planes crashed into the World Trade Center, one into the Pentagon in Arlington, Virginia and one crash landed in Shanksville, Pennsylvania. Following the attacks in New York, the former location of the Twin Towers has been turned into the National September 11 Memorial & Museum. (Photo by Adrees Latif-Pool/Getty Images)

New York City Police Officer Danny Shea, a military vet, salutes at the North pool of the 9/11 Memorial during the tenth anniversary ceremonies of the September 11, 2001 terrorist attacks at the World Trade Center site, September 11, 2011 in New York City. (Photo by David Handschuh-Pool/Getty Images)
Inside of the National September 11 (9/11) Memorial and Museum. Entrance detail. Blue wall with text reading: No Day Shall Erase You From the Memory of Time. (Photo by Roberto Machado Noa/LightRocket via Getty Images)