In April 2001, the National Academy Press placed online a pre-publication copy of the third biennial update of the Institute of Medicine's Committee to Review the Health Effects in Vietnam Veterans of Exposure to Herbicides. In contrast to previous reports that found "inadequate" evidence linking exposure to Agent Orange with leukemia and other cancers in veterans and their children, this report states that there is "limited or suggestive" evidence of an association between exposure and such diseases. This represents a significant shift in medical research on the issue, though the report stops short of making any definite causal connections. The entire text may be read online, and, for those seeking only a summary, a press release is also available. A section of links to previous National Academy of Science publications on this and related issues is also provided.