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Richard Nixon became the first president to resign from office 40 years ago today — an event being marked on social media by his presidential library in Yorba Linda.

The library today has been live-tweeting Nixon’s final hours in office.

The tweets are linked to a portion of an interview Nixon did with a former aide in 1983 that, among other things, looks back on the historic day. The museum has also created a hashtag #APresidentResigns for people to share their thoughts and memories.

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