Wildlife biologist Chris Nadareski, foreground, of the New York City Department of Environmental Protection, assisted by Port Authority structural specialist Pete Mizialko, holds one of four peregrine falcon chicks for banding, at a nest at the east tower of the George Washington Bridge, over the Hudson River, in New York, Tuesday, May 21. In the second photo, the mother bird is seen flying towards northern Manhattan. (Photos: Richard Drew / AP via NBCNews)