PBS NewsHour | News Wrap: TikTok faces legal challenge over impact on mental health of children @PBSNewsHour | Uploaded 3 days ago | Updated 8 minutes ago
In our news wrap Tuesday, TikTok is facing a legal challenge over its algorithm and impact on the mental health of children, President Biden is pushing the nation's water utilities to replace lead pipes within ten years, the UK's spy chief issued a warning about assassination attempts by Russia and Iran and the Nobel Prize in Physics has been awarded to two pioneers of artificial intelligence.

Watch PBS News for daily, breaking and live news, plus special coverage. We are home to PBS News Hour, ranked the most credible and objective TV news show. 

Newsletters: pbs.org/newshour/subscribe 
PBS News podcasts: pbs.org/newshour/podcasts 

Stream your PBS favorites with the PBS app: to.pbs.org/2Jb8twG 
Find more from PBS News at pbs.org/newshour
Subscribe to our YouTube channel: bit.ly/2HfsCD6 

Follow us: TikTok: tiktok.com/@pbsnews 
X (formerly know as Twitter): http://www.twitter.com/newshour 
Instagram: http://www.instagram.com/newshour 
Facebook: http://www.pbs.org/newshour