Sources: Airspace controls over east China could last until Sunday Airspace controls that were imposed over eastern China starting on Tuesday morning might be extended until Sunday, sources with the China Eastern airline company said Thursday. The controls, imposed for unspecified reasons, have affected thousands of passengers traveling to and from eastern China, particularly at airports in Shanghai and Guangzhou. Sources at the Baiyuan airport in Guangzhou, where flights were delayed for at least 1,600 passengers on Tuesday, said several flights were still affected on Thursday, but only for brief periods, with no large-scale passenger delays. The airport advised passengers...