Iraq officials claim that they have shot down an unmanned, unarmed Predator RQ-1B UAV. It is unclear yet whether the UAV was actually shot down or has crashed but the Air Force has confirmed that it is missing. Since 1998 Iraq has fired on aircraft enforcing the "no-fly zone" over 1,000 times with little success until now. If Iraq has downed the UAV, it may be due to recent help from Chinese technicians who have been assisting Iraq in improving their surface-to-air weapon installations. More coverage: BBC News, Associated Press, CNN.