Switched covered a Wired story about how the military has the capability to put drones or planes into the air to restore Internet communication on the ground. This could be a way to keep dictatorial governments from repressing Internet-based communication. One major caveat, military futurist John Arquilla says it would be an act of war.
The scarier part of the story is that the United States most certainly has the capability to turn off communications as easily as it can turn it on. It's too much power, something the United States has had for a long time if you include nuclear weapons, and the like.