Both NASA and the NRO are tight-lipped about the specifics.

但NASA和NRO对细节一直守口如瓶。

Across the country at Vandenberg space force base in California, SpaceX launched a hush-hush mission for the national reconnaissance office or NRO.

在全国各地的加利福尼亚州范登堡太空部队基地，SpaceX为国家侦察办公室(NRO)发起了一项保密任务。

He says that the NRO would probably have ordered spare mirrors to replace any that might have been destroyed by failed launches.

表示NRO很可能本来准备把这两颗卫星用于替代万一发射失败而摧毁的卫星。