Iranian Revolutionary Guard Commander Qasem Soleimani wasn't the only major-league terrorist killed in the drone strike ordered by Trump. Also killed was Abu Mahdi al-Muhandis, a top Iraqi paramilitary leader whose long, bloody career includes attacks on American and other Western embassies, as well as being a founder of Kata'ib Hezbollah, a group responsible for the deaths of hundreds of American soldiers in Iraq. In 2009, the U.S. sanctioned both al-Muhandis and Kata'ib Hezbollah as terrorist entities. In some ways, killing al-Muhandis was more significant than the death of Soleimani. He's been an active terrorist against the U.S. since the...