Israel and Iran have exchanged fire, marking the first such incident since a ceasefire two months ago. The conflict escalated after Israel targeted the Iranian-backed Hezbollah in Lebanon, defying a U.S. request to stand down. Also Monday, Iranian-backed Houthi rebels in Yemen launched a missile at Israel and threatened to disrupt Red Sea shipping. The U.S. has urged Iran to halt missile strikes, promising no further Israeli attacks if they comply. Meanwhile, mediators continue diplomatic efforts to end the conflict and open the Strait of Hormuz.