(Photo: Courtesy of Port Authority of New York and New Jersey)
One World Trade Center near the 9/11 Memorial. (Photo: Jin Lee)
(Photo: Fernando Zaccaria)
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)