Donald Trump is not known for showing his emotions, but as he stood at the White House lectern under a heady shower of flashlights on 7 April 2017 there was a brief flash of the human behind the president’s bombastic veneer. Hours earlier, in Khan Sheikhoun, northwest Syria, families were preparing for another nondescript Tuesday when a Syrian Air Force jet circled overhead and dropped three bombs on the remote Idlib village. Among the payload was a sarin-loaded weapon, a deadly nerve agent, which caused an excruciating death for 89 men, women, and children. Trump’s daughter, Ivanka, reportedl…