Overview:NOVA explores whether "yellow rain," described by members of the Hmong tribe of Laos, is a form of chemical warfare—or a naturally occurring phenomenon.
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First Air Date: Mar 03, 1974Last Air date: Sep 24, 2025Season: 52 SeasonEpisode: 1012 EpisodeRuntime: 55:14 minutesQuality: HDIMDb: 3.961 / 10 by 129 usersPopularity: 30.7321Language: en
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