Traffic crawls past an overturned big rig on Interstate 10 near Buckeye, 

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)
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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