keep this in mind, and yes i believe the two targets of hiroshima and nagasaki were good chioces because if this...
At the time of its bombing, Hiroshima was a city of some industrial and military significance. A number of military camps were located nearby, including the headquarters of the Fifth Division and Field Marshal
Shunroku Hata's 2nd General Army Headquarters, which commanded the defense of all of southern Japan. Hiroshima was a minor supply and logistics base for the Japanese military. The city was a communications center, a storage point, and an assembly area for troops. It was one of several Japanese cities left deliberately untouched by American bombing, allowing a pristine environment to measure the damage caused by the atomic bomb.
The city of
Nagasaki had been one of the largest
sea ports in southern Japan and was of great wartime importance because of its wide-ranging industrial activity, including the production of
ordnance, ships, military equipment, and other war materials.Nagasaki had never been subjected to large-scale bombing prior to the explosion of a nuclear weapon there. On August 1, 1945, however, a number of conventional high-explosive bombs were dropped on the city. A few hit in the shipyards and dock areas in the southwest portion of the city, several hit the
Mitsubishi Steel and Arms Works and six bombs landed at the
Nagasaki Medical School and Hospital, with three direct hits on buildings there. While the damage from these bombs was relatively small, it created considerable concern in Nagasaki and many people—principally school children—were evacuated to rural areas for safety, thus reducing the population in the city at the time of the nuclear attack.
http://en.wikipedia.org/wiki/Atomic_bombings_of_Hiroshima_and_Nagasaki#Hiroshima_during_World_War_II