Sun
If we bought the export versions (ie. the non-USAF standard birds) then we could do it all on our own. Satellite infrastructure is the easy part by either converting to X-band for our Skynet or using commercial Ku providers such as Intelsat (which most use anyway
Unmanned Aerial Vehicle (UAV) | Intelsat General) or go the route of Iridium that the Customs and Border Protection Agency use (with a lot of limitations).
So I don't see infrastructure as an issue - unless you're talking bricks and mortar (which isn't a problem either).
LJ