The Little Engine That Might.

Looks at the invention by Dean Kamen which could bring water and electricity to remote regions of Third World countries. Idea which he stumbled upon while working on a stair-climbing wheelchair; Previous inventions which include the first portable dialysis machine and the Segway scooter; Investment of his own money to develop the Slingshot machine to deliver safe water; How it works; Consideration of using GrameenPhone of Bangladesh's business model in the selling of the generator/purifiers.