They are Kevin Ford from NASA and Russian Cosmonauts Oleg Novitskiy and Evgeny Tarelkin.
At its farthest end is a full-size rocket of the kind that shot Soviet cosmonauts into space.
The six-man crew, which also includes three Russian cosmonauts, is not in danger from the leak, NASA said.
This will be a manned mission, and will deliver two cosmonauts and one astronaut to the International Space Station.
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The three cosmonauts on board, two Russians and a British-born American, were unhurt.
The cosmonauts made sure to take time to snap extra photos of each other before wrapping up their work in space.
On Thursday, March 28, a Russian Soyuz carrying two Russian cosmonauts and an American astronaut launched from Baikonur Cosmodrome at 4:43 p.m.
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Still, the space station's crew -- which also includes three Russian cosmonauts -- were never in danger because of it, NASA said.
Three crew members, Cassidy and Russian cosmonauts Alexander Misurkin and Pavel Vinogradov, will remain on the space station when the others leave.
Cassidy and Russian cosmonauts Alexander Misurkin and Pavel Vinogradov will stay behind.
From June onward, there will be pieces of space station going to orbit and getting connected by spacewalking astronauts and cosmonauts through 2002.
Wannabe cosmonauts also have the opportunity to sink underwater to the ISS replica, which is submerged snugly in a swimming pool 12m deep and 23m wide.
Only fellow cosmonauts have stayed in space longer, including the long-duration champion, Sergey Avdeyev, who on three missions spent 747 days off the planet.
Earlier, Russian Aerospace Agency director Yuri Koptev said that a crew of two cosmonauts was getting ready for blastoff in case of an emergency.
The six-man crew, which also includes three Russian cosmonauts, is not in danger from the leak, NASA said Thursday in a news release.
He spent nearly eight months preparing for the flight with cosmonauts in Russia and trained briefly at NASA's Johnson Space Center in Houston, Texas.
The pictures from space beamed at the mission control at Korolyov, near Moscow, showed the cosmonauts smiling and looking well after their two-day flight.
Meanwhile, astronauts and cosmonauts aboard the International Space Station have said they could see the oil spill while passing over the Gulf of Mexico.
The Soyuz space ship carrying Tito and the cosmonauts will serve as the new lifeboat and the three men will return on the older ship.
In 1978, two Soviet cosmonauts returned to Earth from the Salyut 6 space station after setting a new endurance record of 139 days, 14 hours.
Tomorrow, NASA Astronaut and Expedition 34 Commander Kevin Ford will sit down with Russian Cosmonauts Oleg Novitskiy and Evgeny Tarelkin to enjoy their own Thanksgiving feast.
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This is the first spaceflight for the two Russian Cosmonauts, but Ford was at the station in 2009 on a quick jaunt piloting the Space Shuttle Discovery.
Two female cosmonauts had been launched earlier, including one in 1963, but a woman in space was new to the West, and Ms. Ride was feisty and photogenic.
The cosmonauts were unable to collect a material exposure experiment from the station exterior due to a stuck hinge that prevented it from folding closed, NASA officials said.
He said cooperation between the two space programs is fine and that "things have been getting better" since two cosmonauts salvaged power aboard the battered station three weeks ago.
The Expedition 30 crew includes NASA's Commander Dan Burbank and Don Pettit, Russian cosmonauts Anton Shkaplerov, Anatoly Ivanishin and Oleg Kononenko, as well as Andre Kuipers of the European Space Agency.
Russia said it had been unwilling to postpone the Soyuz mission because the cosmonauts must replace the space station's escape craft, whose service lifetime expires at the end of the month.
Rusty Schweickart, a member of the Association of Space Explorers, a club of ex-astronauts and cosmonauts, has been working with his colleagues to lobby the United Nations to put asteroid-impact planning on the agenda.
ECONOMIST: The American Association for the Advancement of Science
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