Home 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) 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)

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)

NEW YORK, UNITED STATES – 2019/03/18: 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)

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)
Carrie Bergonia of Pennsylvania looks over the name of her fiance, firefighter Joseph Ogren at the 9/11 Memorial during ceremonies for the twelfth anniversary of the terrorist attacks on lower Manhattan at the World Trade Center site on September 11, 2013 in New York City. (Photo by Chris Pedota-Pool/Getty Images)