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The Wall street Journal reports:
Looking for Bombs Buried in Germany? Start Your Search in Alabama
Expert Finds World War II U.S. Ordnance Using Air Force Photos
The trick is to read the shape of the crater. A big one that looks like a doughnut means the bomb detonated as planned. But a pinpoint blemish on a 65-year-old photo taken from thousands of feet in the air may well mark the spot where hundreds of pounds of TNT hit with a thud and became buried in the earth.