The first descent by any vehicle was by Jacques Piccard and Don Walsh in the manned bathyscaphe Trieste in January 1960; unmanned visits followed in 1996, 1998 and 2009. In March 2012 a manned solo descent was made by film director James Cameron in the deep-submergence vehicle Deepsea Challenger.[2][3][4] Between 28 April and 4 May 2019, the DSV Limiting Factor completed four manned dives to the bottom of Challenger Deep.[5] Between 6 June and 26 June 2020, the DSV Limiting Factor added six completed dives.[6] The deep-sea submersible Fendouzhe (奋斗者, Striver) completed a crewed dive to the bottom of the Challenger Deep on 10 November 2020 with three scientists onboard whilst livestreaming the descent.[7][8][9] Between 1 March and 11 March 2021, the DSV Limiting Factor added four completed dives. As of April 2021 the list of people who descended to Challenger Deep comprises twenty-two people.