Credit: (photograph by Marilynn Olson)
LEFT: This German plan of beach obstacles shows barbed wire connecting stakes, ramps, hedgehogs, Belgian Gates, and tetrahedrons, as the beach would appear near low tide. UPPER RIGHT: This Belgian Gate beach obstacle is preserved at the Omaha Beach Memorial Museum in Saint-Laurent-sur-Mer. (© John Hamill) LOWER RIGHT: Don Olson poses with a tetrahedron beach obstacle in the collection of the Battle of Normandy Memorial Museum in Bayeux.