In June 1957, Linus Pauling estimated in a Foreign Policy Bulletin article that 10,000 persons had died or were dying from leukemia because of nuclear tests. A month earlier, Pauling's colleague, E.B. Lewis had published a more detailed analysis in Science. Using four sets of data, Lewis showed that there was no safe level of exposure; leukemia incidence seemed to be directly porportional to the amount of radiation dose. The AEC countered Lewis in an article in Science by Austin Brues, commissions director of Biology and Medicine.