A new era in the American space program is set to begin as two veteran NASA astronauts lift off aboard a SpaceX Crew Dragon en route to the International Space Station — but not quite as soon as originally planned. Bad weather forced flight controllers to scrub Wednesday's scheduled liftoff from Florida's Kennedy Space Center, and the launch now been rescheduled for Saturday.

It will be the first launch of American astronauts from U.S. soil in nearly nine years, since the final flight of the Space Shuttle Atlantis in 2011. It will also be the first manned flight for the SpaceX Crew Dragon and the first time a commercial spacecraft has carried NASA astronauts into orbit.

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