US senators unveil a bipartisan bill that bans kids under 13 from joining social media and requires tech companies to get parental consent for teen accounts (Brian Fung/CNN)

Brian Fung / CNN:
US senators unveil a bipartisan bill that bans kids under 13 from joining social media and requires tech companies to get parental consent for teen accounts  —  A new federal bill unveiled Wednesday would establish a national minimum age for social media use and require tech companies …