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 which will follow ours." However, within only two weeks of the discovery, a British insurance company claimed that it owned the wreck, and several more schemes to raise it were announced. A Belgian entrepreneur offered trips to "Titanic" for $25,000 a head. Spurred by Ballard's appeals for the wreck to be left alone, North Carolina Congressman Walter B. Jones, Sr. introduced the RMS Titanic Maritime Memorial Act in the United States House of Representatives in 1986. It called for strict scientific guidelines to be introduced to govern the exploration and salvage of "Titanic" and urged the United States Secretary of