It is not only snowstorms and South Dakota state troopers that can shut down I90 between Sioux Falls and Rapid City.
Last week, the National Guard closed the interstate to escort a 1,000000 lb chunk of coal to Mount Rushmore where sculptors will begin carving the face of President Obama.
Last week, the National Guard closed the interstate to escort a 1,000000 lb chunk of coal to Mount Rushmore where sculptors will begin carving the face of President Obama.
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