The launch of four astronauts to the space station was delayed on Wednesday. The flight is a key step towards the return of NASA astronauts Suni Williams and Butch Wilmore.
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NASA astronauts' launch to the space station is delayed

The launch of four astronauts to the space station was delayed on Wednesday. The flight is a key step towards the return of NASA astronauts Suni Williams and Butch Wilmore.
source