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

itoggle caption Martin Kaste/NPR

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