What historic milestone did SpaceX achieve in 2020 related to human spaceflight?

Answer

Becoming the first private company to send NASA astronauts to the ISS

In 2020, SpaceX achieved a significant milestone by being the first private entity to transport NASA astronauts to the International Space Station using the Crew Dragon spacecraft, thereby resuming crewed orbital launch capabilities from American soil after a long break.

What historic milestone did SpaceX achieve in 2020 related to human spaceflight?
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