Wikipedia Opens Semi-Protected Articles to Editors

In eight years, Wikipedia has become the world's fifth most popular website, with the goal of providing free access to "the sum of all human knowledge." It relies on millions of online volunteers to write, edit and police entries for accuracy. But lately, more volunteers are quitting than signing on. Today, it announced it's making it easier to edit some of its most controversial articles. Assistant Professor Aniket Kittur studies Wikipedia and other large online projects at Carnegie Mellon University.