Lindsey Reiser reports on the investigation into a fatal school shooting in Wisconsin, the biggest takeaways from President-elect Trump’s first post-election press conference, and the top health stories that defined 2024. Source

Milei is the first world leader expected to be in Washington, D.C. for President-elect Donald Trump’s inauguration, though arrangements are underway for others to join. Source

2024 was a year of historic health headlines. From Ozempic to E. coli, CBS News medical contributor Dr. Céline Gounder joins to look back at the medical stories that defined the year. Source

Several lawmakers are calling for updated policies to help federal agencies investigate and respond to recent drone sightings. The proposals from leaders in New Jersey, New York and Pennsylvania come as the mysterious flying objects have been repeatedly spotted in at least half a dozen states. CBS News congressional correspondent Scott MacFarlane has the latest. Source

According to a Pew Research report, nearly half of American teenagers say they are online “almost constantly.” YouTube tops the list with 90% of respondents saying they use that platform the most, followed by TikTok, Instagram and Snapchat. Psychologist Lisa Damour joins CBS News to unpack the findings. Source

Israel ramped up military operations in Syria on Monday, launching a series of airstrikes on over 60 military sites across the country. CBS News foreign correspondent Chris Livesay has more from Tel Aviv. Source

As the new Syrian authority establishes itself, U.S.-backed forces in the region are concerned about ISIS potentially regrouping. CBS News senior foreign correspondent Holly Williams reports. Source

President-elect Donald Trump held his first post-election news conference Monday. While speaking to reporters at his Mar-a-Lago estate in Florida, Trump addressed a range of issues including his Cabinet picks, foreign policy and trade. CBS News chief Washington correspondent Major Garrett has the details. Source

Svetlana Dali, the woman accused of stowing away on a flight from New York to Paris, was arrested again, according to the FBI. Source

A New Yorker article argues that we are in “the gilded age of medicine.” So what does that mean for U.S. health care? Dr. Dhruv Khullar, associate professor of health and economics at Weill Cornell Medical College and contributing writer at the New Yorker, joins “America Decides” to discuss his piece. Source