No matter how deep Hezbollah's bench is, the killing of its top leader Hassan Nasrallah following an Israeli airstrike against the southern suburbs of Beirut is a devastating blow to the organization.

An Iranian Revolutionary Guard general, Abbas Nilforoushan, was also killed in the Israeli strike that killed the Hezbollah leader, Iranian state media announced Saturday. Nilforoushan was the deputy commander for operations of the IRGC, and was sanctioned by the U.S. for his role in suppressing protests in Iran.