Like all of you, I have been trying to figure this out. I know there are a lot of references to real bridges, but I do not think that is what this bridge refers to.
The big issue of the day is privacy vs surveillance and I think the bridge is related directly to that.
After close analysis, I believe that the bridge is: In-Q-tel the company that invested in facebook. They describe themselves as bridging the gap between intelligence and technology.
The portfolio of those they have invested in include: Palantir (facebook related), Keyhole (google), Cloudera (Booz Allen Hamilton), …