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Libya Refugee Crisis: Hundreds stranded and homeless in desert

Humanitarian groups say hundreds of Libyans are stranded in the desert - unable to return to their homes. The Tawergha people were driven out seven years ago, accused of supporting the country's former ruler Muammar Gadhafi. And as Melinda Nucifora reports, a hard-fought truce allowing them to return appears to have crumbled.

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