Jesse Coburn is an investigative reporter at Streetsblog. He won the Polk Award for Local Reporting for "Ghost Tags," his series on the black market for temporary license plates.“You can imagine this having never become a problem, because it’s so weird. What a weird scam. I’m going to print and sell tens of thousands of paper license plates. But someone figured it out. And then a lot more people followed. It just exploded.”This is the second in a week-long series of conversations with winners of this year's George Polk Awards in Journalism.Learn more about your ad choices. Visit podcastchoices.com/adchoices