A 67-year-old passenger is the latest "disappearance" from a cruise ship.  This case involves a U.S. citizen who sailed on Princess Cruises’ cruise ship Sapphire Princess from Alaska en route to Vancouver.  She has not been identified.

According to Dr. Ross Klein, the leading authority on passenger disappearances in the world , there have been over 120 "disappearances" from cruise ships over the past…