A fact from Explorer II appeared on Wikipedia's Main Page in the Did you know column on 3 May 2013 (check views). The text of the entry was as follows:
Did you know... that Captains Albert W. Stevens and Orvil A. Anderson set a new altitude record on November 11, 1935 by ascending to 72,395 feet (22,066 m) on the helium balloon Explorer II?
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