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The Ledger
On this day

February 20th

1 event recorded on The Ledger.

  1. 1962
    The Rise

    John Glenn orbits Earth; Katherine Johnson verifies

    Astronaut John Glenn becomes the first American to orbit the Earth aboard Friendship 7. He does not board the capsule until NASA mathematician Katherine Johnson has personally verified the electronic-computer trajectory numbers.

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Timeline data: 159 events across The Ledger. See the full 400-year timeline →