Williams is due to lift off atop a Russian Soyuz spacecraft on July 15, along with a Russian cosmonaut and a Japanese astronaut, to serve on the space station's Expedition 32 and Expedition 33 missions.
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Excitement over the first-ever launch of a private spaceship to the International Space Station next month is steadily building, astronauts and National Aeronautics and Space Administration flight controllers said.
"Our fingers are crossed for SpaceX to launch and successfully come to the space station," Indian American NASA astronaut Sunita Williams said during a news conference March 20th.
Private space company SpaceX, based in Hawthorne, Calif., is preparing to launch its Dragon capsule to the space station April 30.
The unmanned capsule will be the first of a new fleet of commercial spacecraft being developed to deliver cargo to the station in the wake of the space shuttle retirement last year.
"We're really excited," said Williams, who will command the space station's Expedition 33 crew.