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9/11 Memorial tickets on sale online Monday

NEW YORK - Registration begins Monday for tickets to visit the September 11th memorial at the World Trade Center site in Lower Manhattan.

The design features two-acre wide pools where the twin towers once stood, with 30-foot waterfalls cascading down.

"Both pools are ready to go," memorial architect Michael Arad told me in an interview this week. "They're testing the waterfalls. They're cleaning the system out."

Our camera got a preview of the north tower pool, which is now completely built and undergoing water testing.

The tree-lined memorial plaza is scheduled to be open for 9/11 family members on the 10th anniversary of the 2001 attacks and to the public starting the next day, September 12th.

"There's a lot of work to do. Tight deadline," Arad told me. "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 names of nearly 3,000 people killed by the attacks will be etched in bronze around the pool perimeters.

Visitors must sign up for timed entry passes at the memorial website -

The site will accommodate 1,500 people at one time, and the memorial foundation expects four million visitors annually.