My father was present at the seventh above ground test.He was a U.S.Army Master Sergent at the very tail end of his career.His function after the blast was to lead(from about 5 miles out)the troops to within 2 miles of the site after detonation.They faced away from the blast with their arms across their faces in full battle gear in rather shallow entrenchments.After a few minutes they proceeded onward.In the late 60`s he developed leukemia.He survived,but was seriously ill to the end of his days.I have seen a multitude of these early photos and the the young participants of these experiments.I often have wondered what became of these men.