A marijuana bud at a marijuana dispensary in Denver. Colorado, Oregon and Washington could become the first to legalize marijuana this fall. Ed Andrieski/AP hide caption

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Supporters turned out for President Obama's first post-debate rally on Oct.4 in Denver. The president is facing a fierce fight for Colorado after winning it by 9 points four years ago. RJ Sangosti/AP hide caption

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Barack Obama in a 1975 photo from the Punahou School yearbook. He and his eighth-grade homeroom classmates pose with a slide projector as part of the yearbook's theme of "Nostalgia." Punahau School 1974-1975 Yearbook hide caption

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Sen. Jon Tester, D-Mont., (center) campaigns at a parade Saturday in Belgrade, Mont. Martin Kaste/NPR hide caption

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The Four Seasons resort on Lanai. Software mogul Larry Ellison recently bought virtually the entire Hawaiian island. Martin Kaste/NPR hide caption

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Former Hawaii Gov. Linda Lingle gives a victory speech in Honolulu after winning the Republican nomination for U.S. Senate on Aug. 11. Marco Garcia/AP hide caption

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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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