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From early trade vessels to Civil War-era steamers, U.S. rivers reveal a rich history as vital lifelines for commerce, conflict and exploration.

Pearl Harbor sparks one of history’s deadliest conflicts—and it’s just the start. Wrecks expose failed missions and fierce battles on every front.

A 200-year-old ship and a top-secret military stronghold lost below the ice. Two stories of ambition and catastrophe, frozen in time, now uncovered.