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Skeletal remains of animals lie in a ravine adjacent to a watering hole near Cameron where dozens of horses were discovered dead last week. (AP Photo/Felicia Fonseca)

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Dozens of wild horses found dead amid Southwest drought

Navajo Nation officials covering the site with lime to help with decomposition and scavengers

Off a northern Arizona highway surrounded by pastel-colored desert is one of the starkest examples of drought's grip on the American Southwest: Dozens of dead horses surrounded by cracked earth, swirling dust and a ribbon of water that couldn't quench their thirst.