Flight 93 National Memorial Fast Facts

A visitor walks along the Wall of Names during the ceremony marking the 10th anniversary of the crash of United Flight 93 at the Flight 93 National Memorial on September 11, 2011 in Shanksville, Pennsylvania. An estimated crowd of 5,000 watched as the memorial wall was unveiled with the names of the 40 passengers who died when the plane crashed during the terrorist attacks on September 11, 2001.

(CNN)Here's a look at the Flight 93 National Memorial. It is a memorial to the 40 passengers and crew who died on United Flight 93 on September 11, 2001 near Shanksville, Pennsylvania.

Facts:
The memorial site is managed by the National Park Service. The memorial encompasses 2,200 acres and the "Tower of Voices," a 93-foot-tall tower with 40 wind chimes.
Features include the Memorial Plaza, 40 Memorial Groves and the Allée, a formal walking path.