Forgive my uncertaintly, but what precisely do you have in mind when you say 'optical interconnects on backbones' here? Do Room 641A and "Collection of communic

Forgive my uncertaintly, but what precisely do you have in mind when you say 'optical interconnects on backbones' here? Do Room 641A and "Collection of communications on fibre optic cables and infrastructure as data flows past" from the You Should Use Both slide http://www.guardian.co.uk/world/2013/jun/08/nsa-surveillance-prism-obama-live#block-51b36893e4b0cc6424372292 http://www.guardian.co.uk/world/2013/jun/08/nsa-surveillance... cover it? (Ironically enough the slide suggests that PRISM is the name for the non-upstream half of the operation.)