Tribute in Light was first presented on March 11, 2002, six months after the attacks, and MAS has presented it annually since.
Comprising eighty-eight 7,000-watt xenon light bulbs positioned into two 48-foot squares that echo the shape and orientation of the Twin Towers, Tribute in Light is assembled each year on a roof near the World Trade Center site. The illuminated memorial reaches 4 miles into the sky and is the strongest shaft of light ever projected from earth into the night sky.