What to know about the growing conflict between Israel and Lebanon's Hezbollah

This week saw a dizzying escalation in the nearly yearlong conflict between Israel and Lebanon’s Hezbollah. First came exploding pagers and walkie-talkies that maimed Hezbollah fighters and civilians around Lebanon and were blamed on Israel. Hezbollah’s leader vowed to retaliate. On Friday, the militant group launched dozens of rockets into northern Israel. Israel said it killed the commander of Hezbollah’s most elite unit with a strike later that day in Beirut that killed at least 45. Early Sunday, Hezbollah fired more than 100 rockets into northern Israel and Israel fired hundreds more rockets back. Many fear the events are the prelude to an all-out war, but both sides have repeatedly pulled back when reprisals appeared to be spinning out of control.