NASA and SpaceX are preparing to launch a crew of four to the International Space Station on Friday.
Dubbed Crew-7, the mission will be commanded by American Jasmin Moghbeli and includes Andreas Mogensen of Denmark, Satoshi Furukawa of Japan and Konstantin Borisov of Russia.
Lift-off is targeted for 3:50am (0750 GMT) from Launch Complex 39A at NASA's Kennedy Space Center in Florida, with a backup opportunity at 3:27 am on Saturday.
It will be the first space mission for both Moghbeli and Borisov.
"This is something I've wanted to do for as long as I can remember," said Moghbeli, a Naval test pilot, during a media call last month.
"One of the things I'm most excited about is looking back at our beautiful planet," added the 40-year-old of Iranian heritage.
"Everyone who I've talked to who has flown already has said that was a life changing perspective -- and also floating around in space, it seems really fun."
Crew-7 is set to be the seventh routine mission to the orbital platform for Elon Musk's SpaceX, with the first coming in 2020.
NASA pays SpaceX for the taxi service as part of a commercial crew program that it put in place to reduce dependency on Russian rockets for astronaut transport after the Space Shuttle program ended in 2011.
Boeing is the other contracted private partner, but its program remains mired in delays and technical difficulties and it hasn't yet flown any crew.
Borisov will be the third Russian to fly on a SpaceX Crew Dragon capsule, fixed atop a Falcon 9 rocket.
Space remains a rare area of cooperation between the US and Russia despite the invasion of Ukraine, with Americans also continuing to fly aboard Russian Soyuz rockets that launch from Kazakhstan.
The crew will spend six months aboard the ISS, where they
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