An architectural model of the 911 Memorial and Museum at the World Trade Center is seen at the Museum's preview site in lower Manhattan in this picture taken March 10, 2011, Construction is continuing at the site as the ten-year-anniversary of the September 11, 2001 attacks approaches in 2011. REUTERS/Mike Segar


Registration began today, June 11 for tickets to visit the September 11th memorial at the World Trade Center site in Lower Manhattan.

The passes will allow people to visit the site at specific times beginning September 12, after the commemoration ceremony for the 10th anniversary of the terror attacks the day before.

Both pools are ready to go, memorial architect Michael Arad told CBS News in an interview this week. They're testing the waterfalls. They're cleaning the system out.  There's a lot of work to do.  Tight deadline.  We just want to make sure everything's done very carefully, because we're not building for a deadline.  We're building for the ages.

The tree-lined memorial plaza is scheduled to open on September 11th for victim's family members.  It will open on the 12th for the general public.

Those wishing to visit can go online and reserve a pass for a specific date and time. You can then enter the screening area during the half-hour block of time that is indicated on your pass.  Once inside, there is no limit on how long you can stay.

While the 9/11 Memorial is free, the site asks for an optional donation that goes towards sustaining the National September 11 Memorial and Museum.

Telephone reservations can be made for groups of 10 or more, and each day a limited number of passes will be available for walk-up visitors at the 9/11 Memorial preview site at 20 Vesey St in Lower Manhattan.

The plaza can accommodate around 1,500 people and officials will have to monitor how long visitors stay at the site to determine how many passes they can issue.

At the time of writing, passes for the first day were no longer available and just a few time slots remained for September 13th.

To reserve a pass and find out more information, CLICK HERE