Israel struck Beirut's southern suburbs Sunday in retaliation to a Hezbollah missile attack on northern Israel, Israeli officials said. Why it matters: Iran threatened last week to launch a missile attack against Israel if it attacks Beirut. Such a move could unravel U.S.–Iran negotiations and reignite the war. Israel notified the Trump administration before the strike, a U.S. official and two other sources with knowledge tell Axios. Driving the news: Israeli Prime Minister Benjamin Netanyahu