Participants gather for the fifth annual 9/11 Memorial & Museum 5K Run/Walk. Photo by Ben Hider, 9/11 Memorial.
An officer trudges through the snow during the height of a snow storm. Photo by Jin Lee, 9/11 Memorial.
Souad Mekhennet, Washington Post correspondent, and Jessica Chen, director of public programs at the 9/11 Memorial Museum, engage in discussion during the fall 2017 public programming season. Photo by Jin Lee, 9/11 Memorial.
Teachers at a recent professional development workshop at the 9/11 Memorial Museum. Photo by Jin Lee, 9/11 Memorial.
Snowy conditions on the 9/11 Memorial plaza on Thursday morning. Photo by Jin Lee, 9/11 Memorial.
The Briest family in a TODAY show segment.
Photo by Jin Lee, 9/11 Memorial
Courtesy Frederic Schwartz Architects
Michael D. Diehl playing in the snow with his children. Courtesy of Voices of September 11th, The 9/11 Living Memorial Project.
Kevin Michael Williams and his fiancée, Jillian, after he proposed to her on Santa Claus' lap at Macy's in December 2000. Collection 9/11 Memorial Museum, gift of Michael and Patricia Williams.