Hungarian-born U.S. software billionaire Charles Simonyi, left, and his wife Lisa Persdotter, right, smile after a press conference in Budapest, Hungary, Thursday, April 16, 2009. Simonyi, a former Microsoft executive, made history to be the world's first repeat space tourist when he was onboard of a Russia's Soyuz spacecraft and arrived on the International Space Station on March 28. Simonyi returned to Earth safely in April 8 and he may be the last private traveler the Russians allow to go to the space station because its crew is about to be doubled. AP Photo logo AP Photo 7 months ago

Hungarian-born U.S. software billionaire Charles Simonyi, left, and his wife Lisa Persdotter, right, smile after a press conference in Budapest, Hungary, Thursday, April 16, 2009. Simonyi, a former Microsoft executive, made history to be the world's first repeat space tourist when he was onboard of a Russia's Soyuz spacecraft and arrived on the International Space Station on March 28. Simonyi returned to Earth safely in April 8 and he may be the last private traveler the Russians allow to go to the space station because its crew is about to be doubled.