In-app screenshot of Google Expeditions. Photo by staff.
9/11 Memorial President Joe Daniels speaking during a public program. Photo by Jin Lee.
Dedication ceremony for “De Oppresso Liber” statue in Liberty Park. Photo by 9/11 Memorial Staff.
Visitor at the 9/11 Memorial Museum's new exhibition, Rendering the Unthinkable: Artists Respond to 9/11. Photo by Jin Lee.
Tributes left on the 9/11 Memorial. Photo by Jin Lee.
Joseph Leavey with Caitlin Leavey in her kindergarten classroom in 1994. Photo gift of the Leavey family in honor of Lt. Joseph G. Leavey.
David Brickley (left), president of the September 11th National Memorial Trail Alliance, the alliance’s vice president, Andy Hamilton (center), and alliance board member Ben Swecker, leave the Flight 93 Memorial Visitor Center on Sept. 12, 2015. Photo by Kecia Bal.
9/11 survivor Florence Jones holding the shoes she wore that day. Photo: Archival video.
Mural created for Gander, Newfoundland in the 9/11 Memorial Museum. Photo by Jin Lee.
The original World Trade Center under construction. Photo by David Bream.