Deadly NYC helicopter crash possibly caused by bird strike, NTSB documents indicate

15 months after a sightseeing helicopter broke up in the air and crashed in New York City's Hudson River, investigators revealed what they believe brought down the chopper, killing the pilot and a family of five. Kris Van Cleave reports.

15 months after a sightseeing helicopter broke up in the air and crashed in New York City's Hudson River, investigators revealed what they believe brought down the chopper, killing the pilot and a family of five. Kris Van Cleave reports.