Muhammad flight from Mecca to Yahtrib became know as the hijra and its marks the first year of the Islamic calendar.
The supporters of the use of the atomic bomb rejected the idea of dropping one on a deserted island because they did not want to waste one of the remaining bombs.
Even though the use of one of the atomic bombs on an uninhabited location was considered, it was turned down because of practical reasons. There were only two bombs available in August, 1945 and they worried that the demonstration bomb might turn out to be a dud.