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Associated Press
Traffic crawls past an overturned big rig on Interstate 10 near Buckeye, Ariz., west of Phoenix, Monday, April 8, 2013. Gusty winds produced by a cold front swept through Arizona, enveloping Phoenix in a dusty haze, closing a stretch of Interstate 40 in the northern part of the state and causing several traffic accidents. (AP Photo/John Nicholson)

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