Cars navigate along the Marsha Sharp Freeway during a dust storm in Lubbock, Texas, Wednesday, Dec. 19, 2012.(AP Photo/Lubbock Avalanche-Journal,Zach Long) ALL LOCAL TV OUT

Associated Press
Cars navigate along the Marsha Sharp Freeway during a dust storm in Lubbock, Texas, Wednesday, Dec. 19, 2012.(AP Photo/Lubbock Avalanche-Journal,Zach Long) ALL LOCAL TV OUT
Cars navigate along the Marsha Sharp Freeway during a dust storm in Lubbock, Texas, Wednesday, Dec. 19, 2012.(AP Photo/Lubbock Avalanche-Journal,Zach Long) ALL LOCAL TV OUT
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