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northernmost part of Chad, a narrow strip of territory that extends along the country's entire border with Libya. The Aozou Strip has an area of about 44,000 square miles (114,000 square km) and consists almost entirely of the Sahara desert. The Tibesti Mountains interrupt the desert in the northwest, near the only town, Aozou. The population consists of scattered livestock herders and a few subsistence farmers, but interest in the strip intensified in the 1970s with the discovery that the area might be rich in uranium deposits.