It will not, however, preclude Hezbollah from planning a future strike over time -- and, judging from past experience, the Lebanese-based terrorist group will not only eye Israeli targets for retaliation, but Diaspora Jewish ones as well.
Mughniyeh, the second-highest official in the Islamic extremist group and seen as a possible successor to Hezbollah's leader, Sheik Hassan Nasrallah, showed no boundaries of brutality or location. He was on the FBI's most-wanted list for the 1985 hijacking of TWA Flight 847 and murder of one of its passengers, U.S. Navy diver Robert Stethem.
Earlier in his terrorist career, Mughniyeh joined Fatah's Force 17, the personal security apparatus of Yasser Arafat. Mughniyeh was one of a number of young Shi'ite Muslims recruited to Force 17 and initially trained by Fatah.
Mughniyeh went on to become a founding member of Hezbollah and was placed in charge of its Special Security Apparatus, also known as the Islamic Jihad Council, whose members were trained by Iran's Islamic Revolutionary Guards. He ultimately became chief of the security apparatus and headed Hezbollah's foreign operations, overseeing terror activities worldwide. Both the Islamic Revolutionary Guards and Iranian Ministry of Intelligence and Security facilitated Mughniyeh's international operations.
The 1983 massive car bombings of the U.S. Embassy and U.S. Marine barracks in Beirut, which killed more than 300 people, and the kidnappings and murders of Westerners in Lebanon, including CIA station chief William Buckley and USMC Lt. Col. William Higgins, as well as members of the Lebanese Jewish community, all are accredited to Mughniyeh.
He gained international notoriety for his involvement, together with Iran, in the 1992 bombing of the Israeli Embassy, and the 1994 bombing of the AMIA Jewish center, both in Buenos Aires.
Serving as Hezbollah's nexus to other terrorist groups, Mughniyeh provided vital assistance and training for Hamas and Islamic Jihad, strengthening the ties of those terror organizations to both Hezbollah and Iran. He also maintained ties with Osama bin Laden and Ayman Al-Zawahiri of Al Qaeda by providing explosives training for Al Qaeda operatives.
Following the Sept. 11 attacks, Mughniyeh was believed to have been instrumental in having organized the escape of up to 50 senior members of Al Qaeda's leadership from Afghanistan to Lebanon, and facilitated the escape of dozens of other Al Qaeda operatives to Iran.
Over the last several years, he further expanded Hezbollah's influence and was reported to be working with Iran to train Moktada Al-Sadr's Mahdi Army in Iraq.
Mughniyeh's most recent activities included his key role in the construction of Hezbollah's military infrastructure in southern Lebanon from 2000 to 2006. With Iran's aid, he oversaw the efforts that transformed Hezbollah into an organization with military-level capabilities. He is also considered responsible for kidnapping Israeli reservists Ehud Goldwasser and Eldad Regev, and he directed Hezbollah fighting against Israeli forces during the 2006 Lebanon war.
What comes next in the post-Mughniyeh era of Hezbollah?
Nasrallah immediately blamed Israel for the Feb. 13 assassination in Damascus, and declared that Hezbollah was prepared to retaliate "anywhere" against Israeli targets worldwide.
The 1992 strike against the Israeli Embassy in Buenos Aires took place several weeks after Israel's assassination of then-Hezbollah leader Abbas Musawi.
Due to Mughniyeh's contacts with Hamas and Islamic Jihad, those organizations may be called upon by Hezbollah to expand their own activities against Israel. Other groups that expressed solidarity after Mughniyeh's assassination may engage in their own violent actions.
Clearly, Hezbollah will not let Mughniyeh's assassination pass without attempting a display of its own capability for revenge. The question is not if, but where and when.
Yehudit Barsky is director of the American Jewish Committee's Division on Middle East and International Terrorism.