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An amazing video of an early nuclear bomb test in the 1950s shows how little was known about the deadly weapon sixty-years ago.
Produced as a promotional video for the American military in 1955, video shows soldiers taking shelter in trenches as the bomb is dropped less than five miles away from them.
And just a few minutes after the initial explosion and debris has cleared the soldiers begin marching toward the bomb site.
Soldiers can be seen being told that “radiation hazard on the ground is over 90 seconds after the bomb goes off.”
Today the devastating power of radiation is far better understood, with relatively recent disasters such as the ones in Chernobyl and Fukushima seeing entire towns and cities evacuated for their own safety.