Stock Photo Description: The "Tribute in Light" memorial is in remembrance of the events of Sept. 11, 2001. The two towers of light are composed of two banks of high wattage spotlights that point straight up from a lot next to Ground Zero. This photo was taken from Liberty State Park, N.J., Sept. 11, the five-year anniversary of 9/11. (U.S. Air Force photo/Denise Gould). Stock photography by Department of Defense Public Domain.