NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
Western Sahara Berm. Landsat satellite image showing the Western Sahara Berm, or Moroccan wall (white). North is at top. The Berm actually consists of six walls, which were built between 1981 and 1987. They were built by the Moroccan government to separate the Moroccan-controlled area of Western Sahara from territory (to the east) held by the Polisario Front, who want independence for Western Sahara.
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