The Berlin Wall - Mentioned in "Warning Order"

The Berlin Wall was more than 140 kilometres (87 mi) long. In June 1962, a second, parallel fence some 100 metres (110 yd) farther into East German territory was built. The houses contained between the fences were razed and the inhabitants relocated, thus establishing what later became known as the Death Strip. The Death Strip was covered with raked sand or gravel, rendering footprints easy to notice, easing the detection of trespassers and also enabling officers to see which guards had...