A harmless warning shot to the desert—in the form of a nuclear missile—is the United States’ only hope of persuading Iran to halt its nuclear program, says billionaire casino mogul Sheldon Adelson. If that doesn’t work, he said, another missile should be sent to annihilate Tehran. During a panel discussion Tuesday at Yeshiva University entitled “Will Jews Exist? Iran, Assimilation and the Threat to Israel and Jewish Survival,” Adelson, a staunch conservative and supporter of Israel, said there is no negotiating with Iran. The country needs to know the United States has a zero-tolerance policy. …