Credit:
NASA / ISS Expedition 29 crew
Big green flash: Brocken Inaglory, CC BY-SA 3.0 https://creativecommons.org/licenses/by-sa/3.0/, https://commons.wikimedia.org/wiki/File:Big_green_flash.JPG Cumulus Nimbus clouds: DilaverPhoto, CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0/, https://commons.wikimedia.org/wiki/File:Cumulus_Nimbus_clouds.jpg
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