April 4, 1973 marked the dedication of the original World Trade Center. (Photo: Fernando Zaccaria)
Bernard Haykel (left) and Clifford Chanin during the first talk in the series in March 2015. (Photo: Jin Lee)
The vessel was found during the excavation of the World Trade Center site. (Photo: Courtesy of the Lower Manhattan Development Corporation)
(Photo: Amy Dreher)
Poster from the first annual NYC Firefighter Stair Climb on March 16, 2015. (Photo: Courtesy of NYC Firefighters Stair Climb)
British Prime Minister Tony Blair gives an interview in "Facing Crisis: A Changed World."

9/11 Museum Receives Award of Merit

(Photo: Jin Lee)
The Survivor Tree on the 9/11 Memorial plaza. (Photo: Amy Dreher)

K9 for Kids: Tails at Ground Zero

Frank Shane and Chance view Nikie's display in the Museum's Historical Exhibition. (Photo: Jenny Pachucki)
A stair climb at One WTC will honor the first responder victims of the 9/11 attacks. (Photo: Amy Dreher)