Much of the country hit hard by a series of snowstorms is now experiencing a shortage of rock salt, used to de-ice roadways.
Ed Whitcomb uses a road grader to plow snow on a county road in Middletown, Ill. (Seth Perlman / Associated Press)
Ice forms at the bottom of a headlight of a truck as it is loaded with salt to spread on streets in Newark, N.J. (Julio Cortez / Associated Press)
Caleb Smith loads bags of rock salt in Winchester, Va. (Ginger Perry / Associated Press)
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City workers in Hattiesburg, Miss., spread salt on a bridge as patches of ice begin to form. (Ryan Moore / Associated Press)
A tow-truck worker hooks up a car that slid off a road in Carpentersville, Ill. (H. Rick Bamman / Associated Press)
In an experiment, a Pennsylvania Department of Transportation truck sprays a de-icing cocktail of brine and beet juice in Butler, Pa. (Gene J. Puskar / Associated Press)
A U.S. Park Service employee spreads salt over the ice-caked World War II memorial on the National Mall in Washington. (Chip Somodevilla / Getty Images)
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Angella Eye of Pottsville, Pa., puts rock salt on her pavement. (Jacqueline Dormer / Associated Press)