What is the fine-grained topic of the following text: Tokyo-Bound Flight U-Turns To LAX To Remove "Unauthorized Person" Due To "Mix Up"
An All Nippon Airways flight en route from Los Angeles to Tokyo was forced to turn around four hours into the eleven hour journey to remove an "unauthorized person" from the flight, angering passengers who were told by the airline that passenger had a ticket for another airline. Only return the topic.
All Nippon Airways flight from Los Angeles to Tokyo turned around due to an unauthorized person on board.