 We're listening back to the interview I recorded last year with Todd Frankel, the lead reporter on the main story of a Washington Post series on the history of the AR-15. That's the weapon that was used by the shooter who attempted to assassinate Donald Trump. The series won a Pulitzer Prize for national reporting this year. The Post has reposted the series on its website. We'll hear more of the interview after a break. I'm Terry Gross, and this is Fresh Air.