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Science, Tech & Environment
PRI's The World
September 04, 2017 · 5:15 PM EDT
The US Coast Guard icebreaker the Polar Sea, pictured here in Antarctica, sparked a controversy in the 1980s that led to a legal compromise regarding the Northwest Passage.
In Science, Tech & Environment and Environment.
Tagged: North America   Canada   United States
December 15, 2017
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