

Billionaire adventurer Sir Richard Branson poses in front of his latest business venture, Virgin Oceanic Expeditions, a deep sea submarine in which he and others plan to take solo piloted expeditions to the deepest point in each of the world's five oceans, in Newport Beach, Calif., on April 5. The first sub is almost 18 feet long and reaches depths of about 37,000 feet. Reed Saxon/AP
Sir Richard Branson (r.) and pilot Chris Welsh pose atop Virgin Oceanic Expeditions' deep sea submarine at a news conference in Newport Beach, Calif., on April 5. Reed Saxon/AP
Sir Richard Branson poses with Amazonian natives and organizers of the Global Sustainability Forum after he spoke about the 'Strategies for the Decarbonization of the Economy' in Manaus, Brazil, on March 25. The second edition of the forum brought together political, business, and environmental leaders to discuss the sustainability of the Amazon. Bruno Kelly/Reuters
The Virgin Galactic SpaceShipTwo, or VSS Enterprise, glides toward Earth on its first test flight after release from the mothership, WhiteKnightTwo, also known as VMS Eve, over the Mojave, Calif., area in 2010. SpaceShipTwo is undergoing rigorous testing before it can carry tourists to space. Clay Observatory for Virgina Galactic, Mark Greenberg/AP/File
Virgin Group head Sir Richard Branson holds an Apple iPad as he stands outside New York's flagship Apple store dressed in a newspaper suit in 2010. Mr. Branson is announcing a multimedia magazine titled 'Project' created specifically for the iPad. Mike Segar/Reuters/File
Sir Richard Branson shows then-Governor of California Arnold Schwarzenegger how travelers can offset their carbon footprint on Virgin America flights right from the seat in-flight. Known for its sustainable practices and high-tech amenities, the California-based airline has the most fuel efficient fleet in the US. PRNewsFoto/Virgin America/File
Virgin Atlantic President Sir Richard Branson rides a jet ski with flight attendant Victoria Lewis (r.) in front of the Bellagio resort in Las Vegas in 2010. Mr. Branson was in Las Vegas to celebrate the 10th anniversary of nonstop service to Las Vegas from Gatwick Airport in London. Las Vegas News Bureau, Darrin Bush/AP/File
Actress Daryl Hannah stands with Sir Richard Branson as he accepts the Eco-Award at the 20th Anniversary Media Awards at the Paramount lot in Los Angeles in 2009. Vince Bucci/AP Images for EMA/File
Sir Richard Branson conducts a news conference alongside Virgin Mother Ship Eve, WhiteKnightTwo, after the completion of his first flight as an onboard crew member at Wittman Field site of the Experimental Aircraft Association Convention in Oshkosh, Wis., in 2009. Allen Fredrickson/Reuters/File
Sir Richard Branson arrives with Virgin Atlantic's VS001, recreating the airline's inaugural flight from London to Newark's Liberty International Airport as part of Virgin Atlantic's 'Red Hot 25th Anniversary' celebration in Newark, N.J., in 2009. Jason DeCrow/AP Images for Virgin Atlantic/File
Sir Richard Branson wears a space suit costume as he makes his entrance at the Volvo display during New York International Auto Show in 2005. Branson was at the auto show to announce the winner of the sweepstakes to fly on a Virgin Galactic space ship. Richard Drew/AP/File
Sir Richard Branson poses for photographers after he announced that his Virgin company plans to launch commercial space flights over the next few years in London in 2004. The Virgin transport, entertainment, and communications group has signed an agreement with aviation designer Burt Rutan to build an aircraft based on Rutan's SpaceShipOne vessel. PA Fiona Hanson/AP/File
Sir Richard Branson test-drives his Gibbs Aquada on the Thames in London after being the first customer to take ownership of an Aquada, the world's first high-speed amphibious vehicle, in 2004. Mr. Branson drove the vehicle across the English Channel to France in 2004 in a record 1 hour, 40 minutes, and 6 seconds. Stephen Hird/Reuters/File
Sir Richard Branson stands with aviation designer Burt Rutan and adventure pilot Steve Fossett (r.) at the unveiling of the Virgin Atlantic GlobalFlyer, a single-engine jet with a 114-foot wingspan, at Mojave Airport in California in 2004. Mr. Fossett flew the jet in the first solo, nonstop flight around the world without refueling in 67 hours, 1 minute, and 10 seconds in 2005. Antelope Valley Press, Rob Layman/AP/File
In 2003, aviation adventurers Steve Fossett (l.) and Sir Richard Branson hold up a model of their jet aircraft that made the first solo circumnavigation of the globe in 2005. Alastair Grant/AP/File
Sir Richard Branson poses with a model of one of his new trains in London in 1998, where he announced orders for $3.05 billion worth of new trains for the Virgin Rail Group. Stefan Rousseau/AP/File