There are MILLIONS of tons of unexploded ordinance from WW I and II in Europe and all over Asia. See : http://en.wikipedia.org/wiki/Red_Zone_%28World_War_I%29
> There are MILLIONS of tons of unexploded ordinance from WW I and II in Europe and all over Asia.
In 1970 I was in Vietnam. We were on top of a small mountain in Vung Tau. At the end of our watch, five of us were driving down to our barracks when our vehicle broke down about at the half way point. While two of the guys who fancier themselves motorheads, fixed the vehicle the rest of us watched. We discovered, not 15 feet off the road and complete hidden with overgrowth, a WW2 Japanese bunker, complete with Japanese rifles, a rotting box of potato masher grenades and a rotting box of mortar rounds. EOD was there the next day getting rid of it. At that time it was 25 years after WW2.