Popular Mechanics shares an interesting look at the history of the C-130 Hercules. The design team was led by Lockheed aeronautical engineer, Willis Hawkins, who later designed the M1 Abrams tank. The size of the cargo hold was determined by drawing a circle around a tank. The C-130 continues to enjoy the longest continuous military aircraft production run in history and still flys in many countries. You might also like to learn about The Awesome A-10 Warthog.