UH Civil Engineering Professor Dr Panos Prevedouros in studio again after a month abroad. We get an eyewitness account from Dr Panos regarding the Greek crisis and then we dive right into rail. We are reported to have the worst traffic congestion in the nation but what is really behind all that? How are cities like Rio de Janeiro (slated to host the 2016 Olympics) handling their mass transportation needs? It's definitely not with rail. In fact, you'd be surprised to hear how the congestion is in cities with rail. Also, get his expert take on currently existing rail systems in various cities around the nation. Hear all about it here.