Reuters: The U.S. Chamber of Commerce filed a civil suit on Monday against an activist group that staged a media hoax last week seeking to draw attention to the debate over climate change policy. The activist group, called the “Yes Men,” on October 19 issued a press release and held a news conference at the National Press Club in Washington, D.C., posing as members of the U.S. Chamber of Commerce, and falsely saying the Chamber of Commerce had decided to support climate change legislation …