It's hard to pinpoint exactly why Governor Christie’s presidential campaign hasn’t caught fire. But his decline in the polls started with a traffic jam back on September 9th, 2013. Two years later, we consider what we still don't know about Bridgegate.  Host David Furst is joined by Andrea Bernstein, Senior Editor for Politics & Policy for WNYC News and Tom Moran, Editorial Page Editor for The Star-Ledger. Here's the scenario. The governor has been given a healthy dose of truth serum. And he's granted Andrea and Tom a no-holds-barred interview. Andrea says it all starts with her most obvious question for the governor; “What did you know and when did you know it?” Meanwhile, United Airline’s CEO Jeff Smisek and two vice presidents resigned this week. United says the move was connected with the company’s internal investigation into its dealings with the Port Authority - and former Chair, and Christie appointee, David Samson. The U.S. Attorney in New Jersey is looking into whether the airline provided a special flight route, known as the "chairman's flight" for Samson in exchange for fee reductions and other benefits. Plus: It's been five years since Facebook founder Mark Zuckerberg appeared on Oprah! with Chris Christie and Cory Booker to announce a $100 million gift to Newark schools.  Reporter Dale Russakoff picks through the pieces of this fascinating recent history in her new book, "The Prize - Who's In Charge of America's Schools?" Check out the WNYC Data News App: The Christie Tracker.