Comment by zh3

Knowing a little bit about this, a 12km spool of 0.125mm plastic fibre costs about $1k [0]. Limits the range still (especially if the fibre is jacketed/supported in anyway).

They'll be back to barrage balloons next [1].

[0] https://www.i-fiberoptics.com/fiber-detail.php?id=3630&sum=1...

[1] https://en.wikipedia.org/wiki/Barrage_balloon