Rick Oborn, spokesman of the National Reconnaissance Office of the Pentagon that designs, builds and operates spy satellites, confirmed the news today, but he declined to spell out the cause.

• 五角大楼负责设计、建造和操作间谍卫星的国家侦察局发言人里克·奥本4日也证实了这一消息，但他拒绝透露推迟发射的原因。