In July 2006 the Union of Concerned Scientists (UCS) released survey results that demonstrate pervasive political influence of science at the Food and Drug Administration (FDA). Of the 997 FDA scientists who responded to the survey, nearly one fifth (18 percent) said that they "have been asked, for non-scientific reasons, to inappropriately exclude or alter technical information or their conclusions in a FDA scientific document." This is the third survey Union of Concerned Scientists has conducted to examine inappropriate interference with science at federal agencies.