A report from the Institute of Medicine (IOM) of the National Academy of Sciences concludes that there is insufficient evidence to determine whether Blue Water Navy veterans were exposed to Agent Orange-associated herbicides during the Vietnam War. The study was requested by the Department of Veterans Affairs in 2011. The IOM reviewed a wide range of data sources including peer-reviewed literature, exposure and transport modeling, interviews with veterans, ship deck logs and other government documents. In a Dec. 26 Federal Register notice the VA determined that available evidence does not support establishing a presumption of exposure to herbicides for Blue Water Navy Vietnam veterans. VA will continue to accept and review all Blue Water Navy Vietnam veteran claims based on herbicide exposure on a case-by-case basis.