The Federal Communications Commission ordered its staff to destroy all copies of a draft study that suggested greater concentration of media ownership would hurt local TV news coverage, according to a story by the AP's John Dunbar.

Former FCC attorney 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.

The FCC staff analysis showed local ownership of television stations adds almost five and one-half minutes of total news to broadcasts and more than three minutes of "on-location" news. The conclusion is at odds with FCC arguments made when it voted in 2003 to increase the number of television stations a company could own in a single market. It was part of a broader decision liberalizing ownership rules.

The research undercut then-Chairman Michael K. Powell's ideological crusade to loosen and eliminate media ownership limits, which would have allowed large national congloms to buy up even more local media. At that time the report was written, the FCC was publicly proclaiming the evidence showed that "commonly owned television stations are more likely to carry local news than other stations" - a conclusion refuted by the FCC's own research, which it then destroyed.
Huffington

Fortunately for the rest of us, the report got leaked to the internets before the FCC could destroy all the copies. Isn't the web a wonderful thing?

Here is the report the FCC tried to destroy in PDF format (requires adobe acrobat reader)