Israel responds after brutal Hamas terror attacks by formally declaring war. Will that war engulf the Middle East? US Secretary of State Antony Blinken joins Dana to discuss. Next, Congress rushes to condemn the Hamas attack and pledges to aid Israelis. But will the lack of a formal House Speaker hamper any US response? Dana gets reaction from key lawmakers, including House Minority Leader Hakeem Jeffries, House Foreign Affairs Committee Chairman Michael McCaul, Republican Senator Markwayne Mullin, and Congressman Mike Lawler. Then, with hundreds Israeli civilians killed and "a significant number" abducted, the world scrambles to understand how Hamas could pull off such a massive surprise attack. Dana speaks with Israeli Minister of Strategic Affairs Ron Dermer, former US Ambassador to Israel Thomas Nides, and former Defense Secretary Mark Esper about what went wrong and how Israel will respond. Finally, our panel of experts discusses the challenges facing Israel and what to expect in the days and weeks ahead.To learn more about how CNN protects listener privacy, visit cnn.com/privacy