After years of construction, the September 11 Memorial Museum opens in New York City.
President Obama will dedicate the memorial Thursday (May 15) to the survivors and families of that deadly terrorist attack.
The cavernous space holds iconic items like the survivors' staircase, a steel beam cross, crushed fire trucks, and the last column removed from the site.
"There's an enormous responsibility in taking on a project like this," Lead Exhibition Designer Tom Hennes said. "It's an ethical, moral responsibility to represent authentically what happened here."
The museum opens to the public May 21. Admission is $24 per person.