Something still doesn't add up for me on this.

1. How does this explanation relate to the slide that the US is the World's Telecommunication Backbone? The only explanation I can think of is that Google, etc... were only providing information for servers that were physically in the US.

2. How does this prism name relate to the program? To me, the prism name seems more linked to fiber optic cable than to this sort of data monitoring. Perhaps it's an allusion to splitting the data stream and reflecting it to the NSA.