https://www.reddit.com/r/HistoryPorn/comments/675rng/swimmers_at_a_las_vegas_hotel_watch_a_mushroom/
origin - http://www.pipiscrew.com/2017/04/swimmers-at-a-las-vegas-hotel-watch-a-mushroom-cloud-from-an-atomic-test-75-miles-away-1953/ swimmers-at-a-las-vegas-hotel-watch-a-mushroom-cloud-from-an-atomic-test-75-miles-away-1953