tribute in light

The tribute produces two vertical columns of light meant to signify the Twin Towers rising high above the Manhattan skyline.

The Tribute in Light returns, and the WTC Transit hub's oculus will open.

The annual memorial is helping scientists understand the ways in which light pollution is impacting the behavior of nocturnal animals.

The NYC Audubon was on scene to monitor migrating birds last night, and asked the Tribute in Light's organizers to turn off the lights a couple times.

The lights will appears around sunset and then fade into the morning.

Artificial light has a way of confusing birds.

The Tribute in Light was first illuminated on March 11, 2002, to mark the six-month anniversary.

Tribute in Light, the temporary monument honoring those lost during the 9/11 attacks, will be turned on tonight at sunset.

The birds will circle the lights until they get exhausted and collapse.

The lights can be seen 60 miles away.

Two tall beams of light were projected skyward last night, a test of the city's Tribute in Light in preparation for next week's 14th anniversary of the September 11 attacks.

For the first time, the 9/11 Memorial Plaza was open, allowing the public to get a close-up look at the lights.