"In 1975, I was called to active duty in the Air Force, studying U.S. space launches that used nuclea..." — Lonnie Johnson

Being an independent inventor is tough. You develop a product, patent it, then you're looking for someone who will see the benefit from this technology. You assume all the investment and all the risk. It can be a challenge.

I got my first patent in 1979 before I left the Air Force. I called it the Digital Distance Measuring Instrument. It used ones and zeros and dots and dashes and a magnifying lens to read binary-encoded information from a scale that was photographically reduced. It used the same kind of technology that's used in CDs and DVDs.

I think America's strength is in innovation.

In 1968 when I was in high school I built a four-foot-tall remote control robot with pneumatic cylinders that operated his hands. My robot won first place at a science competition at the University of Alabama where my high school was the only African-American school represented. That was a huge moral victory.