In the U.S.-Israel war on Iran, airstrikes hit an elementary school in Iran, killing at least 175, most of them children. According to the Pentagon’s preliminary report , the United States is responsible. It’s far from the first time U.S. forces mistakenly hit a purely civilian target and killed innocents. But unlike erroneous civilian killings in previous wars, this one may have involved artificial intelligence—which makes it much harder to work out what went wrong. In one of the worst