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.

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.

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.