Mikhail Kalashnikov — Russian Inventor born on November 10, 1919,

Lieutenant-General Mikhail Timofeyevich Kalashnikov was a Russian general, inventor, military engineer, writer and small arms designer. He is most famous for developing the AK-47 assault rifle and its improvements, AKM and AK-74, as well as the PK machine gun... (wikipedia)

I wanted to invent an engine that could run for ever. I could have developed a new train, had I stayed in the railway. It would have looked like the AK-47 though.
People often ask me how I feel about my invention being used to kill people every day and the AK being a common weapon of ethnic conflicts. I want to make it clear that I created my assault rifle to protect my country. You can blame politicians for its spreading out of control on a global scale.
I'm proud of my invention, but I'm sad that it is used by terrorists.
For years, I had a top secret clearance and never left Russia. Just once did I go to Bulgaria with my wife for a holiday at the Golden Sands resort, but I could not mention my real name. I was allowed to travel abroad only in the early 1990s.
I made it to protect the motherland.