In the frigid forests of the Arctic Circle, not far from the border with Russia, CNN's Isobel Yeung sees how Finnish border guards are training for the threat of war. Stream the full story on the CNN app. | CNN

Former Republican Sen. Ben Sasse announced Tuesday that he's been diagnosed with stage 4 pancreatic cancer. CNN's Brian Todd reports. Read more: https://cnn.it/4jvULWp | CNN

A massive power outage plunged parts of San Francisco into a blackout on the Saturday before Christmas. Power was restored Sunday morning. Read more: https://cnn.it/44Dr7Im | CNN

A CNN investigation found that Circle K has made millions by renting space to crypto ATMs, which are often used for scams. CNN's Kyung Lah reports. https://cnn.it/3Y2kPyo | CNN