Before revision: Tobacco's GEP In February 1993, Philip Morris USA disinformation executive Ellen Merlo wrote a memo to her CEO William Campbell outlining their activities in the area of 'sound-science' .
After revision: Tobacco's GEP In February 1993, Philip Morris USA , Ellen Merlo wrote a memo to her CEO William Campbell outlining their strategies to discredit the 1992 report by the US Environmental Protection Agency (EPA) that identified secondhand smoke as a Group A human carcinogen, and to counter what she described as junk sciencean executive of .