SAN JUAN ISLAND, Wash. — As dawn broke over San Juan Island, a team of scientists stood on the deck of a barge and unspooled over a mile of fiber-optic cable into the frigid waters of the Salish Sea. Working by headlamp, they fed the line from the rocky shore down to the seafloor — home to the region's orcas.

Photos: Scientists hope underwater fiber-optic cables can help save endangered orcas

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