JAFFA, Israel – The deputy commander of the Hezbollah terrorist organization, responsible for infamous deadly attacks against the U.S. and Israel, including involvement in the 1983 bombing of a U.S. Marine barracks in Lebanon, was killed in a car bomb blast in Syria today. Imad Mughniyah was Israel's No. 1 most-wanted terrorist, even ahead of Hezbollah chieftain Hassan Nasrallah. Mughniyah was considered one of the most dangerous terrorists in the world by Western intelligence agencies. He led Hezbollah's "international terror branch," directly orchestrating attacks against foreign targets, according to Israeli security officials. He was widely considered Nasrallah's successor. Mughniyah was...