Jeff Brantingham, creator of PredPol, demonstrates computer-generated "predictive policing" zones at the Los Angeles Police Department Unified Command Post in Los Angeles last year. Damian Dovarganes/AP hide caption

itoggle caption Damian Dovarganes/AP

Take a tour of the Hanford site, a nuclear production complex in Richland, Wash., and you'll see the hundreds of mechanical water pressure gauges wired to the process tubes inside the core. Tour guide Paul Vinther warns that bumping these gauges could throw off the readings enough to trigger a an emergency shutdown of the reactor. Martin Kaste/NPR hide caption

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Pete Ashdown is founder and CEO of XMission, Utah's oldest Internet service provider. Flickr via Center for Study of Ethics at UVU hide caption

itoggle caption Flickr via Center for Study of Ethics at UVU

People wait to attend a Mozilla press conference in Barcelona, Spain, in February. Mozilla's Firefox and other Web browsers allow users to opt out of third-party tracking cookies. Josep Lago/AFP/Getty Images hide caption

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Tech workers looking for jobs may think twice before looking at job ads that are targeted at Americans but actually are intended for foreigners. iStockphoto.com hide caption

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Paul Applewhite of Applewhite Aero isn't allowed to fly this 3-pound Styrofoam plane. That's because he has added circuitry to make it autonomous — it can find its way to specified coordinates — which means it's an unmanned aerial vehicle requiring a special testing permit. Martin Kaste/NPR hide caption

itoggle caption Martin Kaste/NPR

There's been increasing support for the number of H-1B visas, for highly skilled workers. Large tech companies are leading the push for the increase, but many of the visas go to workers at large consulting firms. iStockphoto.com hide caption

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Detective Dave Wells plugs his laptop into a car's event data recorder. A large portion of new cars are equipped with the device, and the government is considering making them mandatory in all vehicles. But some say there should be an "off" option. Martin Kaste/NPR hide caption

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Medical marijuana on display at the grand opening of the Northwest Cannabis Market's Seattle location in February. While recreational pot use is now legal in Washington, the state has not yet issued rules governing the industry. Elaine Thompson/AP hide caption

itoggle caption Elaine Thompson/AP

A small Draganflyer X6 drone on a test flight in Mesa County, Colo. Several police departments around the country are experimenting with using drones, but critics are concerned about potential privacy violations. AP/Mesa County Sheriff's Unmanned Operations Team hide caption

itoggle caption AP/Mesa County Sheriff's Unmanned Operations Team

REI CEO Sally Jewell delivers remarks Wednesday after being nominated by President Obama to be the next secretary of the interior. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images

The NRA and some concealed-carry activists say the best defense against gun violence is armed "good guys." Here, a man fires his pistol at an indoor range in Aurora, Colo., last summer. Alex Brandon/AP hide caption

itoggle caption Alex Brandon/AP