Today. First tonight, President Biden in israel, saying, you are not alone. But the president also with a warning not to make the mistake the u. S. Made after 9 11, with israels potential Ground Offensive imminent. Also, the new clues tonight after that Deadly Strike on that hospital in gaza. Hundreds feared dead. Tonight, President Biden on the evidence so far, and who he believes was behind it. Martha raddatz tonight on this high stakes visit, and ian pannell on this new evidence, including what could be a key piece of sound just before the horror at that hospital, and youll hear it. Also tonight, the growing tensions across the region. What our reporter witnessed outside the u. S. Embassy in beirut. Security forces pushing protesters back from the u. S. Embassy here. David the violent clash between protesters and lebanese soldiers. Demonstrators setting fires. From beirut to the west bank tonight. People telling me here, the time for peace is over. David mola lenghi and matt gutman