In the hills of northern Afghanistan, there are still men with pale skin who talk Russian when they are together.
Until 1981, Nasratullah was a soldier in the Red Army called Nikolai.
Together with two others, now known as Rahmatullah and Aminullah, he survives from a total of five Soviet soldiers known to have been captured and converted to Islam.
They went on to fight against their old comrades with the mujahideen.
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