https://sfist.com/2011/10/20/reminder_october_21_2011_is_the_end/
Reminder: October 21, 2011 is The End Of The World!!!: SFist
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https://www.golfchannel.com/news/article-morning-drive-team-mark-rolfing-october-21-2011
Mark Rolfing - October 21, 2011 - Golf Channel
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https://www.aclu.org/documents/october-21-2011-state-department-letter-responding-wikileaks-foia-request
October 21, 2011 State Department Letter Responding to WikiLeaks FOIA Request | American Civil...
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https://www.sciencefriday.com/episodes/october-21-2011/
October 21, 2011 - Science Friday
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