One year has passed since the Gaza conflict ignited. The conflict has spread across the Middle East and raised fears of an all-out regional war. Israeli air strikes killed two successors to Hezbollah's slain leader, said Israeli Prime Minister Benjamin Netanyahu on Tuesday. While Hezbollah, an ally in Lebanon of the Palestinian militant group Hamas in Gaza, fired many rockets into the northern Israeli city of Haifa. The region continues to grapple with escalating tensions and growing calls for peace.