Part 3/9:
The development of nuclear weapons during the Manhattan Project led to the creation of two distinct types of bombs: "Little Boy" and "Fat Man." The "Fat Man" bomb was a plutonium implosion type, utilizing shaped charges to achieve its explosive power, while "Little Boy" was a uranium gun-type bomb.
"Little Boy" measured approximately 10 feet (3 meters) in length and 28 inches (71 centimeters) in diameter. In contrast, "Fat Man," while also around 10 feet (3.3 meters) long, had a much larger diameter of 60 inches (1.5 meters).