On Wed., Sept. 11, 2019, the 9/11 Memorial & Museum will lead the world in commemorating the 18th anniversary of the horrific attacks of 9/11. Marking this important anniversary, the 9/11 Memorial & Museum will host the annual commemoration ceremony to honor the 2,983 men, women and children killed in the attacks at the World Trade Center site, the Pentagon, aboard Flight 93 and in the 1993 WTC bombing. More.