From Bridgegate to the Chairman’s Flight... and from the scuttling of the ARC Hudson River tunnel project to the precarious finances of state’s depleted transportation trust fund, the Christie administration has been defined by controversy related to travel and transportation.  This week, it was revealed that New Jersey taxpayers have shelled out nearly $1.8 million for his Executive Protection Unit when Governor Christie goes out of state. NJPR’s Matt Katz joins host David Furst to discuss what he calls the governor’s Achilles heel. “Travel and Christie’s personal political ambitions have always been intertwined.” Matt takes us way back to the time before he was U.S. Attorney for New Jersey to show how travel-related issues dogged Christie throughout his career. We’re also joined by reporter, Ginger Gibson. She covered Christie’s personal use of state police helicopters for the Star-Ledger during his first term. Check out the WNYC Data News App: The Christie Tracker and Matt’s new book, American Governor: Chris Christie’s Bridge to Redemption.