Many test subjects suffered severe burns on their skin, including their genitals, leaving them in pain for days and even weeksPhotograph: Frank Baron/GuardianBritish military scientists sent hundreds of Indian soldiers into gas chambers and exposed them to mustard gasPhotograph: Frank Baron/GuardianNewly discovered documents at the National Archives have shown for the first time the full scale of the experimentsPhotograph: Frank Baron/Guardian
Many suffered severe burns on their skin, including their genitals, leaving them in pain for days and even weeks. Some had to be treated in hospitalPhotograph: Frank Baron /GuardianThe reports record that in some cases Indian soldiers were exposed to mustard gas protected only by a respiratorPhotograph: Frank Baron/Guardian
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