[Reel 3, Part 1]
(Reel 3; Radio broadcast from the Explorer 1 launch and the ballistic missiles used to launch it from WTOP.)
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[Reel 4, Part 1]
(Reel 4; Radio broadcast from the Explorer 1 launch and the ballistic missiles used to launch it from WTOP.)
[Reel 5, Part 1]
(Reel 5; Radio broadcast from the Explorer 1 launch and the ballistic missiles used to launch it from WTOP.)
[Reel 6, Part 1]
(Reel 6; Radio broadcast from the Explorer 1 launch and the ballistic missiles used to launch it from WTOP.)
[Reel 7, Part 1]
(Reel 7; Radio broadcast from the Explorer 1 launch and the ballistic missiles used to launch it from WTOP.)