US officials confirm that China was indeed spying, saying its balloon is part of a surveillance op capable of scooping up communications. Plus: President Biden is in Florida, a state Donald Trump won twice, warning seniors that Republicans want to gut Social Security and Medicare. Republicans say that's a lie. And: Congress gets new behind-the-scenes evidence of how Southwest stranded thousands over Christmas. To learn more about how CNN protects listener privacy, visit cnn.com/privacy