KUALA LUMPUR, Malaysia — Searchers zeroed in Friday on a remote island chain in the Indian Ocean for a missing jet that may have flown for hours after it vanished. A Malaysian government official involved in the probe told the Associated Press on Saturday that investigators are now certain that one or more people with significant flying experience hijacked the missing Malaysia Airlines jet, switched off communication devices and steered it off-course. The official said that hijacking was "conclusive" and no longer just a theory http://www.usatoday.com/story/news/wo...