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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The Visa Waiver Program permits citizens of participating countries* to travel to the United States for business or tourism for stays of up to 90 days without a visa.ligible citizens or nationals from all Visa Waiver Program countries must obtain approval through ESTA prior to traveling to the United States under the Visa Waiver Program. Visa Waiver Program travelers are encouraged to apply for authorization as soon as they begin to plan a trip to the United States.