Stock Photo: An American flag hangs above visitors to the National 9/11 Memorial Plaza in the World Trade Center site in New York Wednesday, September 14, 2011 The memorial consists of twin memorial pools on the footprints of the World Trade Center and a plaza plante. An American flag hangs above visitors to the National 9/11 Memorial Plaza in the World Trade Center site in New York Wednesday, September 14, 2011 The memorial consists of twin memorial pools on the footprints of the World Trade Center and a