Here's a link to the BBC documentary "World War One From Above"...
Part-1
http://www.youtube.com/watch?v=_jJ-gEyxek0
Part-2
http://www.youtube.com/watch?v=tHSqS...eature=related
Part-3
http://www.youtube.com/watch?v=b0qGa...eature=related
Part-4
http://www.youtube.com/watch?v=1C6cZ...eature=related
You'll spend about an hour to watch the whole thing...BUT...long lost aerial views, great computer animations, etc. The authors trace the trench lines from approx. Ypres in the north, south for about 400 miles.
Enjoy
Bookmarks