The death of Hassan al-Laqis, a senior Hezbollah commander who was killed on Tuesday in what looks like a clean and especially professional assassination in Dahieh, the Shi'ite quarter of Beirut, is the biggest operational blow to the Lebanese organization since the death of Imad Mughniyeh. Mughniyeh, who was described as the Hezbollah chief-of-staff, was assassinated in Damascus in...