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
Passengers of the RMS Titanic did not have time to open all the gates, leaving many of the confused third class passengers stuck below decks. Numerous notable and prominent people of the era, who held tickets for the westbound passage or were guests of those who held tickets, did not sail. Others were waiting in New York to board for the passage back to Plymouth, England, on the second leg of "Titanic"s maiden voyage. Many unused tickets that survived, whether they were for the westbound passage or the return eastbound passage, have become quite valuable as "Titanic"-related artifacts. Among those who held tickets for a