The Tribute in Light is part of the Sept. 11 memorial celebration. Two beams represent the World Trade Center towers that are no longer part of the skyline. This year, birds entered the beams and were pulled from their migratory path. Host Melissa Block speaks with John Rowden, associate director for citizen science and outreach for the New York City Audubon. He's an ornithologist who recorded the birds caught in the memorial lights.