Because the bill has to go through the House of representatives then get passed to the president by the bill may become vetoed making it hard for bills to become laws.
The use of atomic bomb on Nagasaki and Hiroshima prevented the massive invasion into Japan that was scheduled for the fall of 1945. The United States has dropped two nuclear bombs on Nagasaki (August 6, 1945) and Hiroshima (August 9, 1945) after getting the consent of United Kingdom (as required and agreed upon in Quebec Agreement).
they were going for educational opportunities for their children