>> special correspondent there for us from tent city. join us how to reflect on haiti adds recover ci is jonathan truck, author of "the big truck that went by how the world saved haiti and left behind a disaster", that tells the story. i know you have come back from haiti, were there signs of progress, anything that you can advance. >> depends on how you want to measure progress. the easiest thing it to foengs on the fundamental conditions and promise of the response after the earthquake. that was in bill clinton and other words, to build back better. that has not happened. things have changed, it's been four years, people re-built the homes but that's an example. people who are leaving the camps and going back to homes like before are building them out of shoddy materials, they are the same lack of government oversight on how the instruction is undertaken, and ultimately the country and the capital city port au prince is as vulnerable today as years ago. >> one of the things we reported on is the colora epidemic that plagued haiti, and