Undated Press Eye handout photo of Dr Robert Ballard, the oceanographer who discovered RMS Titanic in its watery grave, who will be in Belfast to deliver a memorial lecture, as part of a series of events marking the night the liner sank a century ago. PRESS ASSOCIATION Photo. Issue date: Saturday April 14, 2012. See PA story ULSTER Titanic. Photo credit should read: Brian Thompson/Press Eye/PA Wire
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