If these are open to public, then there must be merely mo secrets from the US Military.
They could see the movements of militaries and even the military bases establishments.
They are pretty smart, so they would even be giving a satellite governance to their Navy and other cargo boats carrying strategic instruments, just in case to avoid from pirates.
Interesting, uncle Sam has got every secret of every country. How about some shelters to hide a airbase like, tin led on the whole area and taxi area, hangers and buildings except for runway? Or even give shiny aluminium coating to reflect off light and avoid a look on runways as much as possible.
I heard that in mountains (can't get it, were they military or militants) used smoke grenades to veil from the US Military satellites.