The Justice Department said Twitter obtained data from more than 140 million users for security purposes but then used data to target users with ads, the company's primary source of revenue.

An expert on Section 230 talks with the ProPublica editor-in-chief about how we got here and how we should regulate our way out.

Technology has been blamed for disrupting our sleep, but a group of Silicon Valley companies want to put tech back in the bedroom for the right reasons.