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| The viaduct was protected by an air observation post on the highest point in the area. To conceal the bridge against attack, a 'Nebel-Kompanie' with smoke generators was stationed two miles north east of the viaduct in a field near the River Aa. |
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| A 20mm flak gun battery manned by 24 teenage boys was set up on the slope above the viaduct and a Vierling cannon was on the viaduct itself. The young crews for these weapons were billeted in nearby huts. |
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