"The Tribute in Light is assembled atop the parking garage over the entrance to the Brooklyn Battery Tunnel near Ground Zero in preparation for the remembrance of the 9/11 terror attacks on the World Trade Center.
There are spotters in New Jersey, Brooklyn and Manhattan helping to determine if the lights are straight. By flagging the individual light, the spotters and the workers on site are sure they are all looking at the same light.
Each tower of light is made up of 44 individual lights. They will all be turned on before sunset on 9/11 and become visible as the sun sets. They will fade away at dawn on 9/12. "
