13. The Atomic Bomb
America was the first and only nation in the world to ever drop an atomic bomb.The dropping of the atomic bomb is often noted as the end of World War 2. You may not know, but the United States actually dropped two atomic bombs on Japan. The first bomb was dropped on August 6, 1945 on Hiroshima and wiped out 90% of the city’s population. The second bomb was dropped three days later on Nagasaki which killed another 40,000 people. The atomic bomb in turn ended World War 2 as Japan withdrew after the bombs dropped. However, the invention of the atomic bomb also brought about the Cold War with Russia.