The rear door of the Learjet 60 private plane fell off while Bono
and his four friends were in the air, German Federal Bureau of Aircraft Accident Investigation toldABC News.
"The Learjet lost a door where the luggage was put in," official, Germout Freitag, said. "There can be many reasons for this incident. Either something broke on the door or the door wasn't closed properly. Those are the usual problems that occur."