For anyone interested in heroic efforts done in WW2.
Ever heard of the heavy water in Norway? I grew up in that small village where the heavy water was produced.
I heard the saboteurs tell their story, and it was amasing to sit there and listen. I've walked almost the whole route they took.
I was assisting when BBC made a documentary on it, and here you can watch it:
Trust me, these mountains in wintertime, is no easy task to manage...