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CAPE CANAVERAL, Fla. — An attempt to send the Artemis One moon rocket into space is being scrubbed once again.

NASA cited a hydrogen leak as the reason why.  A previous attempt was postponed on Monday.

Launch director Charlie Blackwell-Thompson and her team tried to stop the leak the way they did the last time, which included stopping and restarting the flow of super-cold liquid hydrogen in hopes of removing the gap around a seal in the supply line.

They tried this method twice, but the leak persisted, forcing them to once again scrub the planned launch.

A similar issue happened on Monday, but turned out to be a faulty temperature sensor in one of the main rocket’s engines.

It’s not clear when NASA plans to try and launch again.