There had been some talk earlier that we as humans did not have the capability to search to the depths where this incident occured. This has recently changed. Woods Hole Oceanagraphic Institute demonstrated 6.8 Miles at the bottom of the Mariana Trench on May 31, 2009.
link to press release
News Release : Hybrid Remotely Operated Vehicle “Nereus” Reaches Deepest Part of the Ocean : Woods Hole Oceanographic Institution