People, just think about it, why would US want to listen in on every citizen's coversation? It doesn't make any sense. They probably have the ability to but highly doubt they are. Look at how US has been know to operate in areas where it has keen interest in. It will only target those influential positions/persons and try and manipulate them into its corner. You can rest assured, they have a keen ear on the leaders of this country illegally and anywhere else that stands to significantly affect their interests whichever way.
Every wondered why most computer related virus threats hardly have any targeting our establishments in kenya as a primary target?.. you only hear of foreign establishments being taken down because that's where it is worth it and we get hit as a secondary objective. So unless your really really worth it, there is no way they will be wasting time with your conversations.