Lonnie Johnson: I'm Lonnie Johnson. I'm an inventor. The invention that most people know me for is the Super Soaker water gun. I knew the gun worked well, and I knew it would be successful.

Most high school students have never heard of Onesimus. He was an enslaved African man who was instrumental in the mitigation of smallpox in Boston. In 1721, Onesimus introduced his owner, Cotton ...