What to know as Israeli forces' historic push inside Lebanon complicates an Iran deal

Israeli forces are engaged in their deepest incursion into Lebanon in over two decades. This is happening despite a U.S.-brokered ceasefire and initial direct talks between Israel and Lebanon. Israel is targeting Hezbollah, an Iranian-backed militant group. Lebanon accuses Israel of widespread destruction. Over 3,300 people have been killed in Lebanon since fighting began.