Comment by bonestamp2

That is fascinating. Out of curiosity, how far apart would the paths have had to remain in order to be ok with just two links? Like, I'm thinking a plane crash between those two links in the 400m zone could destory both links so a third link makes sense, but if it were 800m that would probably be fine? Or what magnitude of disaster are they trying to mitigate and how much separation would that require for just two links?