Rule of thumb: To best ensure destruction, never create

At Echidne of the Snakes:

Adam Candeub, now a law professor at Michigan State University, said senior managers at the agency ordered that “every last piece” of the report be destroyed. “The whole project was just stopped - end of discussion,” he said. Candeub was a lawyer in the FCC’s Media Bureau at the time the report was written and communicated frequently with its authors, he said.