nobody. hitler never had the bomb
An option was to send troops to the mainland but that option was not better than dropping the bombs.
The US was the first country to develop the Atom bomb by the end of WWII and the president at the time (Harry Truman) used it to end WWII by droping it to Japan twice in different cities.
Leo Szilard, the inventor of the atomic bomb (patent GB630726), did not build it himself. He wrote a letter that he had Albert Einstein sign and send to president FDR warning of the potential of atomic bombs and that the Nazis were probably working on them already. If the Nazis got atomic bombs first the Allied cause was lost. FDR authorized funds for a study, the study recommended a full program be begun under direction of the Army. This program became the Manhattan Project, which built the bomb. Leo Szilard was one of hundreds of scientists employed by the Manhattan Project during WW2.
Some say that Truman wanted to send a message to the Soviet Union - Apex
They learned not to drop atomic bombs even through their silly nuclear arms race during the Cold War. Trust me no one wants to send off an atomic missile because a huge part of the world would be annihilated.
Albert Einstein did not create the atomic bomb. The atomic bomb was invented by a group of scientists in the United States. The majority of the research and testing went on at the weapons research and design laboratory at Los Alamos, New Mexico. Einstein did, however, send a letter to president Roosevelt encouraging the United States to begin research on an atomic weapon, and many of Einstein's theories went into the creation of it.The atomic bomb was not invented in the US, it was invented in London, England in 1933 by Leo Szilard and patented by him in 1934. However it took 12 more years, many scientists & engineers & technicians, and an enormous investment in new industrial infrastructure before the first atomic bombs could be built.
Because the US and Japan were at war, japan having attacked the US in 1941, and had refused to surrender.
The US dropped an atomic bomb on Japan and told them they would drop another if Japan did not surrender. They didn't surrender, so the US dropped a second atom bomb. The US then told Japan that they would send a THIRD atom bomb (which they actually didn't have. It was a HUGE bluff), and luckily for mankind, the Japanese DID surrender.
Why would you even want to do that!?
cool
Japan was going to loose the war anyway but I understand the need to send them a message of supremasy. President Truman stated that these weapons will end the war and save lives.
Absolutely not!!