Officials at the Sept. 11 Memorial in New York City say they plan to announce Thursday that the site has had 1 million visitors since opening to the public this year.

The memorial plaza and its two huge fountains now draw about 10,000 visitors each day to ground zero, even as construction continues on the rebuilt World Trade Center.

Visitors are required to get free passes in advance. No more than 1,500 people are allowed on the lower Manhattan site at a time.

The memorial opened on Sept. 12 after its dedication on the 10th anniversary of the terrorist attacks.