. >> reporter: betty discussed her problem with ken reardon, the professor of city planning at the universityn memphis. >> how big of a problem is food insecurity. >> it's invasive among poor and working class people. >> reporter: he tried to bring supermarkets back to the area. >> one of the representatives of the i don't national chains said i would love to cap my career in a city that i love, but i couldn't bring this to my management team. they would laugh me out of the boardroom. >> is that fair that they don't want to come there? >> absolutely not. it's irrational. they're giving up a market share that they could be selling to . >> reardon went back to the drawing board. there was eugene, a deacon at a local church known for its work with the poor. champion i don' champion said it was one of his parishioners who came up with the idea of the green machine. all they needed to do was come up with $150,000 and find a vehicle. >> they gave us a bus. we stripped it down, washed it, primed it and painted it. it's not like any other bus that you've ever seen. >> the first day that you launched