Eye witness on tv has just said she saw a small four seater fixed wing "doing acrobatics" just prior to the event which has confused reports for the moment. She didn't say she saw it hit. She wanted to make it plain it wasnt a helicopter. BBC are now reporting the FAA view that it was FW. Is it still permissible to fly a small FW at low level VFR in this area of NY? It used to be a constitutional right to fly up and down within the (tight) confines of the Hudson River, but has that now been repealed?