First Steps Into the Void — STS-6

On April 4, 1983, two astronauts open a hatch, step out of everything humanity has ever built, and become the first people to walk in the open void from a Space Shuttle — a door no one has opened before, 322 kilometers above the Earth. Today marks the maiden voyage of a spacecraft that would go on to define an era, beginning with a single, quiet moment of extraordinary bravery. Step inside the mission that launched Challenger — and changed how humanity reaches across space.

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