ATLANTA—In a telejournalism first, CNN announced Monday that from now on, all of its information will come from its own 24-hour, closed-circuit news channel, "CNN-CNN." "The old method of gathering news, in which information was culled from the Associated Press, Reuters, our own reporters and the other 24-hour news channels, was inefficient and needlessly complicated," CNN owner Ted Turner said. "Now, we have a single, consolidated, in-house news source to which CNN can turn exclusively." If the venture is successful, an airport version of CNN-CNN, CNN-CNN-Airport News, will be launched for traveling CNN reporters.