Passengers on the luxury Queen Mary 2 cruise ship are threatening to mutiny after the ship set sail from Florida with a damaged propeller. They have said they will refuse to disembark when the ship reaches Rio de Janeiro, Brazil, next week, to prevent it from continuing its journey. It has dropped three ports of call because it is running at reduced speed after the accident. Cunard Lines, which operates the ship, says it has offered compensation. On tow The world's largest liner is on a 38-day trip around South America. However it is running two days behind schedule,...