SpaceX aborts launch of four-man crew to space station just before liftoff

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SpaceX aborts launch of four-man crew to space station just before liftoff
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The launch of a SpaceX Crew Dragon capsule carrying a four-man crew bound for the International Space Station was called off with less than three minutes to go early Monday.

In a frustrating disappointment, the launch of a SpaceX Crew Dragon capsule carrying a four-man crew bound for the International Space Station was called off with less than three minutes to go early Monday because of trouble with a system used to ignite the Falcon 9's first stage engines.

The scrub was triggered by a problem with the engine igniter fluid, a chemical known as triethylaluminum triethylboron, or"TEA-TEB," that reacts with liquid oxygen to spin up the Falcon 9's nine first stage engines. Whenever Crew-6 takes off, Bowen and company will be welcomed aboard the station by Crew-5 commander Nicole Mann, Josh Cassada, Japanese astronaut Koichi Wakata and cosmonaut Anna Kikina, the first Russian to launch aboard a Crew Dragon. They arrived at the station last October and plan to return to Earth around March 6 to close out a 151-day mission.

Instead, a replacement Soyuz -- MS-23 -- was launched last Thursday, carrying equipment and supplies instead of a crew. The spacecraft successfully docked with the station Saturday night, providing Prokopyev and his crewmates with a safe ride home.

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