The FBI is investigating what happened to a woman who vanished on a Carnival Cruise Lines ship, the AP reports. The unidentified Ohio woman was last seen by her family members on Saturday night, but she wasn't reported missing until yesterday, when the ship, the Imagination, docked in Miami after four days out. According to Carnival Cruise Lines, foul play is not suspected. Between 2003 and 2005, at least 24 people have gone missing from cruises, according to a lobbyist group report.
