"To the best of our knowledge he was last seen in the North Tower around the 32nd floor," Ramirez said. "Some survivors who got out from other fire companies said they saw him beginning to work his way down -- they were doing last minute checks to make sure there were no civilians on the floor -- and the towers fell."
The parents of Andrea Haberman donated her recovered pocketbook and its contents to the museum.
"Keys to her apartment and her brand new apartment -- she was engaged to be married," Ramirez said.
Haberman, 25, from Chicago, visiting New York on a business trip, was on the 92nd floor of the trade center in the office of Carr Futures. Her dust-covered cell phone is also among the artifacts. After the plane hit, she was unable to call her parents or fiancé or to get out.
"One thing that worried her parents was that she died alone among strangers," Ramirez said. "They connected with other Carr Futures families and discovered that there were a number of calls that were made out from the 92nd floor and some reference to a young woman and trying to calm her, and they took some consolation that she had not died alone."
The unique observations of astronaut Frank Culbertson are also planned for the museum. Culbertson was orbiting Earth in the international space station on 9/11 and noticed a strange plume of smoke emanating from New York City. NASA mission control in Houston informed him of the terrorist attack.
"I know it's very difficult for everybody in America right now, and I know folks are struggling with this and trying to deal with this and recover from it," Culbertson said in a recorded radio transmission. "But the country still looks good, and for New Yorkers, your city still looks great from up here."
"The sense of public service, of empathy, of compassion, of shared grief, of shared responsibility, to help rebuild -- all of that is our story too," Greenwald said. "It's really a museum about 9/12. This is a museum that takes you from this horrific day, this unimaginable loss, and then we move you to the world after 9/11."
Until the museum is finally built, memorial visitors can see only a few 9/11 artifacts encased in a visitor center just off the trade center site.