"This will be one step in the long road to human expansion off of the planet into low-Earth orbit and beyond, " NASA astronaut Donald Pettit, one of Burbank's crewmates aboard the station, said Friday.

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If all goes well, astronauts Donald Pettit and his partners, observing and filming the capsule from inside the station, are supposed to manipulate a roughly 50-foot robotic arm to grab and pull the capsule into a docking port.

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