distance damage, although comparatively light, extended for several more
miles. Glass was broken up to 12 miles.

In Nagasaki, a smaller area of the city was actually destroyed than in
Hiroshima, because the hills which enclosed the target area restricted the
spread of the great blast; but careful examination of the effects of the
explosion gave evidence of even greater blast effects than in Hiroshima.
Total destruction spread over an area of about 3 square miles. Over a
third of the 50,000 buildings in the target area of Nagasaki were destroyed
or seriously damaged. The complete destruction of the huge steel works and
the torpedo plant was especially impressive. The steel frames of all
buildings within a mile of the explosion were pushed away, as by a giant
hand, from the point of detonation. The badly burned area extended for 3
miles in length. The hillsides up to a radius of 8,000 feet were scorched,
giving them an autumnal appearance.



MAIN CONCLUSIONS


The following are the main conclusions which were reached after thorough
examination of the effects of the bombs dropped on Hiroshima and Nagasaki:

1. No harmful amounts of persistent radioactivity were present after the
explosions as determined by:

A. Measurements of the intensity of radioactivity at the time of the
investigation; and