The following comes from

Bill Moyers:
But shining the spotlight on political corruption is nothing compared to what can happen if you raise questions about corporate power in Washington, as my colleague Marty Koughan and I discovered when we produced a program for David Fanning and "Frontline" on pesticides and food. Marty had learned that industry was attempting behind closed doors to dilute the findings of the American Academy of Sciences study on the effects of pesticide residues on children. Before we finished the documentary, the industry somehow purloined a copy of our draft script - we still aren't certain how - and mounted a sophisticated and expensive campaign to discredit our program before it aired. Television reviewers and editorial pages of key newspapers were flooded with propaganda. Some public television managers were so unnerved by the blitz of misleading information about a film they had not yet broadcast that they actually protested to PBS with letters that had been prepared by the industry.
Here's what most perplexed us: the American Cancer Society - an organization that in no way figured in our story - sent to its 3,000 local chapters a "critique" of the unfinished documentary claiming, wrongly, that it exaggerated the dangers of pesticides in food. We were puzzled. Why was the American Cancer Society taking the unusual step of criticizing a documentary that it had not seen, that had not aired and that did not claim what the Society alleged? An enterprising reporter named Sheila Kaplan later looked into those questions for the journal Legal Times. It turns out that the Porter Novelli public relations firm, which had worked for several chemical companies, also did pro bono work for the American Cancer Society. Kaplan found that the firm was able to cash in some of the goodwill from that "charitable" work to persuade the compliant communications staff at the Society to distribute some harsh talking point about the documentary before it aired - talking points that had been supplied by, but not attributed to, Porter Novelli. Legal Times headlined the story "Porter Novelli Plays All Sides." A familiar Washington game.
Others also used the American Cancer Society's good name in efforts to tarnish the journalism before it aired, none more invidiously than the right-wing polemicist Reed Irvine, who pumped his sludge through an organization with the Orwellian name Accuracy in Media. He attacked our work as "junk science on PBS" and demanded Congress pull the plug on public broadcasting. Fortunately, PBS once again stood firm. The documentary aired, the journalism held up and the publicity liberated the National Academy of Sciences to release the study that the industry had tried to cripple.
Read the whole article:
http://www.alternet.org/story/149925/bill_moyers:_america_can't_deal_with_reality_--_we_must_be_exposed_to_the_truth,_even_if_it_hurts?page=entire