Hyungsoo Kim brought his sons Woosuk (left) and Whoohyun to California from Korea so the boys could get an American public-school education. In "goose families," one parent migrates to an English-speaking country with the children, while the other parent stays in Korea. Martin Kaste/NPR hide caption

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A nearly 70-foot dock that was torn loose from a fishing port in northern Japan by last year's tsunami washed ashore on Agate Beach in Oregon. Marine scientists have found potentially invasive species among the 100 tons of marine life that traveled aboard the dock. Oregon Department of Parks and Recreation/AP hide caption

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A memorial outside Seattle's Cafe Racer on Thursday, a day after a deadly shooting inside. Just a few days later, musicians gathered outside the coffeehouse for an improvised memorial jam session. Stephen Brashear/Getty Images hide caption

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Homeland Security analysts watch for threats to U.S. technological infrastructure at the National Cybersecurity and Communications Integration Center. Jim Watson/AFP/Getty Images hide caption

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Demonstrators with Guy Fawkes masks protest changing privacy policies on March 31, in Vienna. Ronald Zak/DAPD/AP hide caption

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In politics, video tracking has become normal. And it's a growth industry. There are trackers working for campaigns, political parties and, increasingly, political action committees. iStockphoto hide caption

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The Seattle Space Needle's 50th anniversary is Saturday. Though the top of the Needle has been off-white for years, it's being painted its original color, "galaxy gold," for the anniversary. Dan Callister/Getty Images hide caption

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Several Web browsers, including Mozilla's Firefox, enable users to request additional privacy online via a "do not track" button. But there's no consensus on how much privacy the button should offer users. Leon Neal/AFP/Getty Images hide caption

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