William Kremer interviewed Lonnie about racial barriers, the invention of the Super Soaker, and his new ceramic battery technology.

Lonnie Johnson was brought up in Mobile, Alabama in the 1960s, when black children were not expected to go far, but such was his talent for engineering that he worked for Nasa, and helped test the first stealth bomber. But as he explains here, the invention that made his fortune was a water pistol – the extremely powerful Super Soaker.

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