Vodkapundit points to some fascinating pics from World War One that are the first I've ever seen in color. Very cool.
UPDATE: After looking at the pics for a while and rereading Vodkapundit's post, I am reminded of a film I saw recently about the continuing costs of war. There are men called Demineurs in France who search for unexploded ordnance from both wars at a rate that will allow them to finish in another 700 years. Hundreds of them have died doing this job, and men and women do the same in many other places, and will continue to do so for centuries.