A panorama I assembled based on old photos my Uncle John had of Nagasaki, after the blast.
After the war, the US Merchant Marine brought ships into Japan.
One of the vessels had a crew member from Alexandria, MN, (last name Godfrey) they were allowed to travel.
They took these photos, without any protective clothing.
From looking at google Earth, near as I can tell they took the photos from somewhere at or near the Iwasugi Shrine (which would also explain the apparent tombstones in the bottom far left of the photo)