How was David Atchison only president for a single day?

Supporters of the atomic bomb argued against the idea that the united states should not use the bomb against japan by

Which areas where seperated by the iron curtain

Which action by the us war department angered chief red cloud to the point that he refused to sign the treaty of fort laramie ? a) the killing of buffalo by the united states troops b) the appointment of troops to the powder river basin c) the burning of parts of the powder river basin d) the murder of chief red cloud’s wife