text:  Frankel was the lead reporter on the main story of a Washington Post investigation into the history of the AR-15. The series won a Pulitzer Prize this year for national reporting. Frankel is an enterprise reporter on the financial desk of the Post. We're going to hear the interview we recorded this morning. Then we'll dive deeper into the gun's history and current place in gun culture and listen back to the interview we recorded last year when the AR-15 series was published.