Today on CNN 10, we’re traveling back in time to look at the history of wartime presidents and their surprise trips to dangerous war zones. It turns out President Biden was in good company when he made an unexpected visit to Ukraine. Then later in our show, we’re headed to Venice, where the famous canals are empty of water. And see why hockey fans went crazy for this adorable 4-year-old caught on camera. Jeanne Moos has the story!