this looks promising despite some digitising acrobatics....
Norwegian TV series based on a real story:
http://www.nrk.no/video/PS*183061
the first two episodes here but i am not sure if it is available outside Norway: http://tv.nrk.no/serie/kampen-om-tungtv ... /episode-1
based on a true WWII story .. a really tough story about how the allies worked hard to prevent the German Nazis to make an atom bomb during WWII. the essence is quite clearly seen in this trailer. it has just began on Norwegian TV but it looks promising because this one stretches the storyline from the early 1930s to the end so it is much more complete than the previous films i have seen made.
earlier versions: http://youtu.be/cwjiETe8Dsw 1948 norwegian french version 1948 sample.
hollywood film version 1965 "Heroes of Telemark" - romanticised version full movie http://youtu.be/E5y-A3LFSS0
trailer: http://youtu.be/7kkgIe1TI5k
reviving the real story: http://youtu.be/7kkgIe1TI5k
the saboteurs did climb down and up this gorge under the bridge to and from the raid in winter/icy conditions while german guards guarded the bridge.This video tells the story of the saboteurs who prevented the nazis creating an A-bomb during world war 2, and a group of men attempting to relive the way the real heroes of telemark did so many years ago.

better overview of the arena:

well, shoot... rubber bands....