A crocodile stashed in a duffel bag got loose on an airplane, frightened passengers and led to a crash that killed 20 people on board, according to an inquiry into the accident. The lone survivor of the crash in the Democratic Republic of Congo told the story to investigators, the U.K.’s Telegraph reported on Thursday. A British pilot was among the dead. The plane was on a routine domestic flight from the capital of Kinshasa to a regional airport in Bandundu when the bizarre tale unfolded on Aug. 25. An unnamed passenger had hidden the crocodile in a large duffel...