This looks interesting: ATOMIC COVER-UP: Two U.S. Soldiers, Hiroshima & Nagasaki, and The Greatest Movie Never Made. From the author:
On August 6, 1945, the United States dropped an atomic bomb over the center of Hiroshima, killing at least 70,000 civilians instantly and perhaps 50,000 more in the days and months to follow. Three days later, it exploded another atomic bomb over Nagasaki, slightly off target, killing 40,000 immediately and dooming tens of thousands of others. Within days, Japan had surrendered, and the US readied plans for occupying the defeated country–and documenting the first atomic catastrophe.
But the Japanese also wanted to study it. Within days of the second atomic attack, officials at the Tokyo-based newsreel company Nippon Eigasha discussed shooting film in the two stricken cities. At this point, the American public knew little about conditions in the atomic cities beyond Japanese assertions that a mysterious affliction was attacking many of those who survived the initial blasts (claims that were largely taken to be propaganda). Newspaper photographs of victims were non-existent, or censored. Life magazine would later observe that for years “the world…knew only the physical facts of atomic destruction.”
Tens of thousands of American GIs occupied the two cities. Because of the alleged absence of residual radiation, no one was urged to take precautions.
Then, on October 24, 1945, a Japanese cameraman in Nagasaki was ordered to stop shooting by an American military policeman. His film, and then the rest of the 26,000 feet of Nippon Eisasha footage, was confiscated