 Today is the final day of the annual NATO summit. It's the 75th, and it's taking place in Washington. Over the last three days, the military alliance focused on China, Russia, the war in Ukraine, and defense spending. For more on all of this, let's bring in CBS News intelligence and national security reporter Olivia Gazis. As you see there, she's joining us from the State Department. Olivia, President Biden met with Ukrainian President Volodymyr Zelensky on the sidelines of the summit just a short time ago. What came of that meeting?