Passengers participate in a memorial service, marking the 100th year anniversary of the Titanic disaster, aboard the MS Balmoral Titanic memorial cruise ship, at the wreck site in the North Atlantic Ocean, early Sunday, April 15, 2012. Cruise ship passengers and crew said prayers Sunday at the spot in the North Atlantic where the Titanic sank 100 years ago with the loss of more than 1,500 lives. (AP Photo/Lefteris Pitarakis)