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Hidden camera footage augments this perilous, high-stakes journey as we embed with families attempting to escape oppression, ultimately revealing a world most of us have never seen. 根据：。In the ice-gripped environment of Alaska's Admiralty Island, summer offers the briefest of respites. Year-round residents such as bears and seals turn to the salmon-filled waterways for sustenance. Meanwhile, migrants descend in droves, from humpback whales to over 140 million seabirds--almost half the birds in the Northern Hemisphere.。