Visitor passes for the first day of the soon-to-be-opened 9/11 Memorial vanished within an hour of being made available on Monday morning.

A dedication and private service will be held on September 11, 2011 for relatives of victims of the September 11, 2001 terrorist attack.

The memorial's inaugural ceremony will coincide with the tenth anniversary of the attacks, an event likely to be attended by some 3,000 family members of victims. On Sept. 12, 2011 the 5,000 people who snapped up the visitor passes will enter. A spokesman for the memorial told tTe Daily News that a crush of people trying to obtain passes made some ticket-seekers unable to log on.

Due to a large volume of requests, some people are unable to come into the site and make reservations, said memorial spokesman Michael Frazier. But many people have been able to get in.

Located on a 16 acre parcel of land at the site of the World Trade Center in Lower Manhattan in New York City, the memorial will feature two reflecting pools, waterfalls, and about 400 trees.