The 9/11 Liberty Memorial is dedicated to greater Prince William area residents and all those who died as a result of the terrorist attacks of September 11, 2001. The shape of the reflecting pool and plaza recalls the 184 lives lost at the Pentagon. Two columns of water represent the 2,749 lives lost at the World Trade Center in New York City. Pennsylvania Flagstone encircling the plaza serves as a tribute to the 40 lives lost near Shanksville, Pennsylvania. A single stone to the left is an original limestone block from the collapsed portion of the Pentagon. The names of the greater Prince William area victims, most of whom perished at the Pentagon, are inscribed on the west wall of the reflecting pool, honoring their memory and America's patriotic spirit.