Mikhail Kalashnikov

Mikhail Kalashnikov was a Russian military engineer who designed the AK-47 rifle, a popular weapon in the 20th century. Although he worked on rifles and tanks, he said he always wanted to design tractors.

Just before his death, he wrote a letter to his church. He wrote that his soul was in pain, and that he finally realized the true nature of his legacy. (AUDIO: Masterplan)