Facebook is having a tough time with stories that trend on the social network. The company has been accused of gaming what it shows as "trending" on the site, and sometimes favoring things it showed to people. Not long ago, it fired the human editors who took care of it, but then earlier this month, a fake story about Megyn Kelly. It apologized for the slip, but it has happened again. The Hill reports: Facebook is taking heat yet again for its Trending Topics section after featuring a story from a British tabloid pushing a conspiracy theory that the World Trade Center collapsed on Sept. 11, 2001, because of a "controlled demolition." Facebook users who clicked on the "September 11th Anniversary" trending topic Friday were presented an article titled "September 11: The footage that 'proves bombs were planted in Twin Towers.'"