[throwaway3neu94]

> Do you think it a coïncidence that most spy satellites are launched from Vandenberg?

It's not a coincidence, it's geography.

It is desirable for reconnaissance satellites to cover the entire planet regularly. That means high inclination orbits. That means southward launches (as opposed to eastward). That requires a launch site with ideally lots of ocean and not a lot of population to the south/southeast.

The US does plenty of military launches into other orbits from the east coast.

[dnautics]

technically you could also do northward launches, but if you look at the geography of the US, it does not cooperate and provide northward ocean in many places.