There’s a common thread between the suspects behind the killing of 23 people at a Walmart in El Paso in 2019, the mass shooting in Buffalo in May, and the attack on a crowd in Highland Park on Independence Day: They were all radicalized online and left behind a trail of digital activity. NBC News reporter Ben Collins spoke with Apple News In Conversation host Shumita Basu about how online spaces are leading to extremism and producing a generation of mass shooters. Below are excerpts from the interview.