At 9/11 Tribute in Light, A Rare Opportunity for Bird Researchers Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email For birders, the 9/11 Tribute in Light is a test tube for how birds are affected by light pollution. ( Oliver Lazarus ) Produced by Oliver Lazarus Produced by PRI and WNYC