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Rock formations called chalk Inselbergs glow as the sun sets in the Farafra Depression of south-western Egypt, 02 September 2007. Farafra, the home of the White desert with an estimated area of 1,800 square kilometres and lying 400 kilometres southwest of Cairo, is known worldwide for its unusual wind eroded rock formations. The Inselbergs found here are wind-carved eroded remnants of the Upper Cretaceous Era that are studied to understand similar formations found on other planets. More than 200 tourism-related personnel in this region are being educated about their preservation and to protect the fragile desert ecosystem. AFP PHOTO/CRIS BOURONCLE (Photo credit should read CRIS BOURONCLE/AFP/Getty Images)
Rock formations called chalk Inselbergs glow as the sun sets in the Farafra Depression of south-western Egypt, 02 September 2007. Farafra, the home of the White desert with an estimated area of 1,800 square kilometres and lying 400 kilometres southwest of Cairo, is known worldwide for its unusual wind eroded rock formations. The Inselbergs found here are wind-carved eroded remnants of the Upper Cretaceous Era that are studied to understand similar formations found on other planets. More than 200 tourism-related personnel in this region are being educated about their preservation and to protect the fragile desert ecosystem. AFP PHOTO/CRIS BOURONCLE (Photo credit should read CRIS BOURONCLE/AFP/Getty Images)

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Mexico is demanding answers after eight Mexican tourists were killed in what the Egyptian military is calling a case of mistaken identity. CNN's Ian Lee has more.