Glaciers are made up of fallen snow that, over many years, compresses into large, thickened ice masses. Glaciers form when snow remains in one location long enough to transform into ice. What makes glaciers unique is their ability to move. Due to sheer mass, glaciers flow like very slow rivers.
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About Visa Waiver Program. It is a program that permits visa-free travel to the United States for citizens of 38 partner countries around the world. The Visa Waiver Program (VWP) is administered by the Department of Homeland Security (DHS) in consultation with the State Department.