This image made from video provided by shows a massive dust storm over Phoenix Arizona Friday July 25, 2014
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Phoenix, Arizona, covered by huge dust cloud

26 July 2014 Last updated at 15:18 BST

A large dust storm has covered the city of Phoenix in Arizona, causing poor visibility and tough driving conditions.

Aerial footage shows the giant sand cloud moving across the sky covering streets and major road networks.

Maxine Mawhinney reports.

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