Answer:
United States
Step-by-step explanation:
The U.S. actually dropped two atomic bombs on Japan in 1945. After the development of the Manhattan Project, (in which the U.S. did research on atomic weapons and tested some atomic bombs) Japan didn't surrender even after Germany did. The U.S. government then decided to give them a final warning, if they refused, an atomic bomb would be dropped. As we know, the Japanese didn't surrender and the first atomic bomb, named "Little Boy", was dropped in Hiroshima on August 6, 1945. It is believed that between 90,000 and 166,000 died from the bomb in the four-month period following the explosion. On August 9 of the same year another atomic bomb, named "Fat Man" was dropped in Nagasaki, killing thousands of people. After the bombing, the Japanese government surrended on August 14.