NEW YORK (AP) — New York City Police Commissioner Raymond Kelly is elaborating on his headline-grabbing claim that his officers could shoot down a terrorist plane if needed.Kelly said Wednesday that he would not make the decision alone to shoot down a suspected terrorist plane. He says he'd consult with Mayor Michael Bloomberg and federal authorities before deploying a police aircraft armed with .50-caliber guns.Kelly spoke of the anti-aircraft capability in a "60 Minutes" interview that aired Sunday on CBS.He now says he was talking about a small aircraft being used to disperse anthrax or some other toxic material, not shooting down a commercial airliner.He says the capability would only be used in extreme circumstances.