Changes are in the works for one of the most secretive spy agencies in the U.S. government: the National Reconnaissance Office.

The agency's director, Bruce Carlson, a retired Air Force general who took on his new role last year, gave an update on his office's plans and laid out some details this week at the annual Air and Space Conference, just outside Washington. The NRO builds and operates the country's classified spy satellites and is one of the bigger players in Top Secret America.

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