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The number of people attempting to illegally cross the U.S-Mexico border has plummeted, but the number of migrants dying during the trek through the mostly desert region has not. The U.S. Customs and Border Protection continues its efforts to secure the border and prevent deaths in the area, Border Patrol officials said.

The volume of sea ice in the Arctic hit a new low this past winter, according to observations from the European Space Agency's (Esa) Cryosat mission.