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
Sinking of the RMS Titanic believed that ice posed little risk; close calls were not uncommon, and even head-on collisions had not been disastrous. In 1907, , a German liner, had rammed an iceberg and suffered a crushed bow, but was still able to complete her voyage. That same year, "Titanic"s future captain, Edward Smith, declared in an interview that he could not "imagine any condition which would cause a ship to founder. Modern shipbuilding has gone beyond that." As "Titanic" approached her fatal collision, most passengers had gone to bed and command of the bridge had passed from Second Officer Charles Lightoller to First