美国空军发言人表示，美国空军准备授予一项合同，对一架波音747客机进行改装，用于执行行政专机运输任务。

Core Viewpoint - The U.S. Air Force is preparing to award a contract for the modification of a Boeing 747 aircraft to serve as an executive transport. [1] Group 1 - The contract will involve the conversion of a Boeing 747 passenger plane for official transport duties. [1]