Two humpback whales' improbable 90-mile journey from the San Francisco Bay took them through the Sacramento River and the deep-water shipping canal that ends at the Port of Sacramento.
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A humpback whale swims near Vacaville, Calif, on May 14, 2007. At least two whales were been spotted in the Sacramento River, which prompted the Coast Guard to issue warnings to keep boats and aircraft away from the mammals. (AP)