Russia renewed its assault around Kyiv, Ukraine, a day after they claimed to scale back military operations during delicate peace talks in Istanbul on Tuesday. And in southern Ukraine, Russian forces continue to bombard the port city of Mariupol. The city's mayor called it a humanitarian catastrophe as about 160,000 remaining residents lack electricity and access to food and water. Plus, a four-legged robot dog called Spot is digging around the ruins of Pompeii, Italy, to help archaeological park managers preserve and protect the historical site.