Pianist Ronan Magill of London practises his composition "The Titanic Waltz" before a performance on board the Titanic Memorial Cruise in the mid-Atlantic Ocean April 11, 2012. The cruise is retracing the voyage of the ill-fated Titanic liner, which hit an iceberg and sank 100 years ago on April 15, 1912.[Photo/Agencies]

Amateur model builder Adam England of Huntington Beach, California admires a model of the Titanic built by youth at Abbey Dingle Boatyard in Wales, on board the Titanic Memorial Cruise in the mid-Atlantic Ocean April 11, 2012. The cruise is retracing the voyage of the ill-fated Titanic liner, which hit an iceberg and sank 100 years ago on April 15, 1912.[Photo/Agencies]