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.
Robert Gray's helmet and respirator are currently in Historical Exhibition 3 in the 9/11 Memorial Museum. (Photo: Jin Lee)