Hiroshima
On the morning of August 6, 1945, at 8:15 a.m. local time, the United States dropped an atomic bomb on Hiroshima. The bomb, code-named "Little Boy," exploded approximately 1,900 feet (580 meters) above the center of the city.
The explosion instantly released a blinding flash of light and generated temperatures of several million degrees Fahrenheit. This caused anything within a mile of the blast zone to be vaporized or charred. The blast wave from the explosion was so powerful that it leveled buildings within a two-mile (3.2 km) radius.
Hiroshima was immediately engulfed in flames, and the intense heat and radiation produced by the blast caused a firestorm that lasted for several hours. Many people who had initially survived the blast were killed or injured by the firestorm, or by falling debris from collapsed buildings.
The bomb also released large amounts of radioactive fallout, which spread over a large area. This radiation contributed to the deaths of thousands of people in the weeks and months following the blast, many of whom died from acute radiation syndrome or from long-term health problems caused by the radiation exposure.
Nagasaki
Three days after the bombing of Hiroshima, on August 9, 1945, the United States dropped a second atomic bomb on the city of Nagasaki. The bomb, code-named "Fat Man," exploded at 11:02 a.m. local time, approximately 1,650 feet (500 meters) above the center of the city.
The effects of the Nagasaki bombing were similar to those of the Hiroshima bombing, although slightly less severe due to the hilly terrain of the city. The blast wave from the explosion destroyed or severely damaged most buildings within a two-mile (3.2 km) radius, and the city was again engulfed in flames.
Thousands of people were killed instantly by the blast or the firestorm, and many others died in the following weeks and months from radiation sickness. The Nagasaki bombing ultimately claimed the lives of an estimated 70,000 to 80,000 people.
The aftermath of the bombings
The bombings of Hiroshima and Nagasaki had a profound impact on Japan and the world. The bombings caused unprecedented destruction and loss of life, and they ultimately led to Japan's surrender and the end of World War II.
The bombings also raised important moral and ethical questions about the use of nuclear weapons and the future of warfare. These questions remain relevant today, and they continue to be debated by historians, politicians, and scientists.