The original plan was to fly around the Moon for the Artemis II mission, which is currently scheduled for April, and then attempt a lunar landing with Artemis III in 2028.
tee() splits a stream into two branches. It seems straightforward, but the implementation requires buffering: if one branch is read faster than the other, the data must be held somewhere until the slower branch catches up.
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Ian YoungsCulture reporter, Mama Roux's, Birmingham