The Denver Post: The U. S. Department of Justice can’t find more than 60 boxes of business records tied to the decades-old investigation of Rocky Flats, the former nuclear weapons plant that environmental groups contend left behind widespread contamination at its Jefferson County site.

The lost boxes represent the latest twist in an ongoing fight by a coalition of groups that want to shut down the site, which opened to the public as a national wildlife refuge in September after undergoing a decade-long cleanup that concluded in 2005.

The documents being sought were subpoenaed by a grand jury that met from 1989 to 1992 to look into environmental crimes committed at Rocky Flats, which produced plutonium triggers for the nation’s nuclear arsenal throughout the Cold War.

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