Five months after disappearing while flying over the Nevada desert, Steve Fossett was declared dead by a Chicago court.
Dozens of planes and helicopters spent more than a month searching 20,000 square miles of the western Nevada mountains, one of the most remote and uninhabited regions of the US.
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Throughout his life Mr Fosset had set more than 90 aviation records in balloons, fixed-wing aircraft, gliders and airships and 23 sailing records. Some 60 still stand.
On his sixth attempt, in 2002, he became the first person to fly solo around the world in a balloon - in one unsuccessful bid he plunged five miles into the sea off Australia.
Three years later made the first solo, non-stop, non-refuelled flight around the globe in the Virgin Atlantic Global Flyer.
He also swam the English Channel, completed the Ironman Triathlon and the Iditarod dog sled race and climbed the Matterhorn in Switzerland and Mount Kilimanjaro in Tanzania. Everest, however, eluded him.
Mr Fossett, who earned his fortune as a financial trader, broke the round-the-world sailing record by six days in 2004 and even set world records for cross-country skiing.
The Telegraph obituary
Steve Fossett, who has been declared dead aged 63, made his fortune on the Chicago futures exchange and embarked on a dogged campaign to break more world records than any other sportsman in history; he set 116 records in hot air balloons, sailing boats, gliders and powered aircraft, getting into numerous scrapes and surviving several brushes with death.
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He was known in Britain for his friendship with Sir Richard Branson, an erstwhile rival balloonist who became a co-sponsor.
Branson once described Fossett as "a loner: half-Forrest Gump, half android" and suggested that he was not so much interested in sport for its own sake as in testing the limits of his own endurance: "If there's an ocean to swim, he'll choose Christmas Day and it must be snowing and, if possible, the only day in the last decade when the channel ices over," Branson observed. "That's Steve for you."
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At some point in his thirties Fossett typed out a list of his lifetime sporting goals. These included swimming the English Channel, climbing the highest mountains on six continents, establishing eight world records in sailing, and flying non-stop around the world in a balloon. Once his business was firmly established he set out to tick items off the list. He achieved them all - and more. He became a fellow of the Royal Geographical Society and of the Explorers' Club, and in 2002 won the Gold Medal of the Fédération Aeronautique Internationale.