Man Malis lies on her belly in the sun-scorched Cambodian dirt. Sweat drenches her face as the 29-year-old tenses with concentration, excruciatingly slow and gently prodding the parched dust in front of her. Creeping inch by inch, she uses her left hand to steady the metal probe in her right — she cannot let it deviate from a 30-degree angle, lest she push too hard. Then, bingo, she makes contact. She pauses and inhales deeply. A foot in front of her face and an inch below the soil is a Chinese-made type-72 land mine.

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