'We just got out of the way in time - otherwise we would have been roasted.' 'Picture I took as we were getting out of the way when the 'mushroom' came up higher than was anticipated,' Bierman wrote. He produced some of the first images of the mushroom cloud, pictures that Bierman's son, Mitchell, has hanging in his home in Randolph, with a handwritten note from his father. Bierman, who served as a tail-gunner aboard on both the Hiroshima and Nagasaki missions, was one of the crew members charged with taking pictures after the explosions.