2. The bombing of Hiroshima and Nagasaki
Towards the end of the second world war, the United States detonated nuclear weapons over Japan. Two weapons to be precise over the cities of Hiroshima and Nagasaki after getting the United Kingdom’s consent. These two bombings killed between 129,000 to 226,000 people, mostly civilians. This remains the only time in history that nuclear weapons have been used in war.