Expert explains frequency of plane engine fires and bird collisions after American Airlines emergency.

An American Airlines flight carrying 173 passengers and crew was forced to return to Ohio's John Glenn Columbus International Airport after an apparent bird strike, with video aboard the plane showing one of the engines shooting flames as flight attendants explained the aircraft was having a "little situation" and encouraged passengers to review the safety information provided in their seat pockets. No injuries were reported in the incident, and the plane was taken out of service for maintenance.