A man checks in at a Malaysia Airlines counter at Kuala Lumpur International Airport in Sepang, Malaysia, Tuesday, March 18, 2014. Checks into the background of all the Chinese nationals on board the missing Malaysian jetliner have uncovered no links to terrorism, the Chinese ambassador in Kuala Lumpur said Tuesday. The remarks will dampen speculation that Uighur Muslim separatists in far western Xinjiang province might have been involved with the disappearance of the Boeing 777 and its 239 passengers and crew early on March 8. (AP Photo/Lai Seng Sin)