The Danger of unexploded WW2 Bombs is a daily risk.
23rd October 2006 at the Autobahn near Aschaffenburg, during Maintenance Works on the Autobahn a 250 lbs explods and kills one worker, four bypassing semitrailer trucks are damaged beyond repair.
Five Weeks after the explosion another 250 lbs Bomb was found just 200 meters away from the explosion site at the Autobahn A3:
And there are still Thousands of them somewhere to be found, everywhere.