 Todd Frankel was the lead reporter on the main story of a Washington Post series on the history of the AR-15. The series won a Pulitzer Prize for National Reporting this year. The Post has reposted the series on its website. Our interview was recorded last year when the series was first published. After we take a short break, Ken Tucker continues his series on great albums that were recorded 50 years ago and revisits a Stevie Wonder album. This is Fresh Air.