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.
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.
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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.
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Protesters demonstrate at City Hall in Seattle on Feb. 16, 2011, after the announcement that police officer Ian Birk would not face charges for the fatal shooting of John T. Williams.
Ted S. Warren/AP
Then-Capt. Brent Clemmer said Staff Sgt. Robert Bales distinguished himself as a team leader in Clemmer's C Company, 2nd Battalion, 3rd Infantry Regiment during the Battle of Zarqa, Iraq. The faces of the rest of Bales' squad have been obscured.
Courtesy Maj. Brent Clemmer