Eventually, it became evident that the U.S. would launch no serious and immediate retaliatory attack for the Beirut Marine barracks bombing beyond naval barrages and air strikes used to interdict continuous harassing fire from Druze and Syrian missile and artillery sites.[88] A true retaliatory strike failed to materialize because there was a rift in White House counsel (largely between George P. Shultz of the Department of State and Weinberger of the Department of Defense) and because the extant evidence pointing at Iranian involvement was circumstantial at that time: the Islamic Jihad, which took credit for the attack, was a front for Hezbollah which was acting as a proxy for Iran; thus, affording Iran plausible deniability.[2] Secretary of State Shultz was an advocate for retaliation, but Secretary of Defense Caspar Weinberger was against retaliation.