The official opening of the National September 11 Memorial & Museum is still years away, but visitors to Ground Zero now have a "preview site" where they can share their experiences, learn about New York's darkest day, and see how construction is progressing.

The 3,000-square-foot space at 20 Vesey St. will host rotating exhibits of 9/11-related "artifacts," photographs, and a special recording booth that allows members of the public to contribute monologues on where they were during the attacks. Chuck Bennett