Wreck of the RMS Titanic research. The stern section, which had previously received relatively little attention from explorers, was specifically targeted for analysis. The microbial colonies aboard "Titanic" were also a key focus of investigation. The second expedition, from 27 May – 12 June 2004, saw the return of Robert Ballard to "Titanic" nearly 20 years after he discovered it. The expedition spent 11 days on the wreck, carrying out high-resolution mapping using video and stereoscopic still images. 2005 saw two expeditions to the "Titanic". James Cameron returned for the third and last time to film "Last Mysteries of the Titanic". Another expedition searched for
Wreck of the RMS Titanic US and the UK. Only a few days after Ballard's discovery of the wreck, Jack Grimm – the author of the unsuccessful early 1980s attempts to find "Titanic" – claimed ownership of it on the grounds that he had allegedly been the first to find it. He announced that he intended to begin salvaging the wreck. He said that he "[couldn't] see them just lie there and be absorbed by the ocean floor. What possible harm can [salvage] do to this mass of twisted steel?" Titanic Ventures Inc., a Connecticut-based consortium, co-sponsored a survey and salvage operation in 1987 with