Ralf, a mechanical engineer
Ralf is the technical director of an organization that works with wheelchair builders in developing countries.
I began working in Nicaragua in 1980, with a group of teenagers. When I arrived they started looking at my homemade chair, a fancy 4-wheel-drive hand-pushed chair. One kid took a good look at my chair and said, ‘It’s going to break.’ As he explained why, I realized he knew what I needed to know to make my own chair better. I have to work with him.