French authorities crack down on magnet fishing over fears of World War II bombs

I've read in separate accounts that the U.S., Britain, and Germany

The United States and World War II - Peace History % %

Bomb squad warning over magnet fishing

Magnet fishermen pull live WWII grenade from canal, spark bomb scare

What is magnet fishing? Unexploded ordnances found in Charles

Corroded, half-buried, iron, circular object found in the woods

Fisherman Reels In Unexploded Military Device

Submarine Report - Vol. 1, War Damage Report No. 58

Guns, bombs, WWII artifacts found while magnet fishing in Michigan

The hidden dangers of magnet fishing

Florida man finds WWII grenade magnet fishing, takes it to Taco Bell