For the first time, a study suggests that Alzheimer's disease may be preventable if treatment begins early, before symptoms appear. CBS News' Dr. LaPook spoke with the doctor leading the clinical trial. | CBS News

FORMER PRESIDENT BIDEN'S message to President Trump: “You work for us Mr. President, we don't work for you.” | Fox News

SENATOR SANDERS: "The Democrats are saying, 'No, you have to sit down and negotiate,' and Republicans are refusing to do that. That is the reason why we are in a shutdown." | Fox News

NEW: NYC Mayor-elect Zohran Mamdani delivers a four word message to President Trump: "Turn the volume up." | Fox News