“They’re perfect soldiers,” Ballans said, quoting a line attributed to the Khmer Rouge leader Pol Pot. “They don’t have to sleep. They don’t have to eat. And they’ll do the job for decades.” www.newyorker.comThe Dangerous Work of Clearing Russia’s Deadly Mines from Ukrainian LandsDonald Trump has promised to bring a swift end to the war in Ukraine, but Russian troops have already booby-trapped the country with thousands of mines that will take years to remove.