[PAR] [TLE] Rocky Flats Plant [SEP] The Rocky Flats Plant was a former nuclear weapons production facility in the western United States, near Denver, Colorado.  Operated from 1952 to 1992, it was under the control of the U.S. Atomic Energy Commission (AEC), succeeded by the Department of Energy (DOE) in 1977. [PAR] [TLE] Rocky Flats National Wildlife Refuge [SEP] The Rocky Flats National Wildlife Refuge is a unit of the National Wildlife Refuge System in the United States located approximately 16 mi northwest of Denver, Colorado.  The site was previously the Rocky Flats Plant's security buffer zone and is not currently open to the general public for access.
[PAR] [TLE] Rocky Flats Plant [ SEP ] The Rocky Flats Plant was a former nuclear weapons production facility in the western United States , near Denver , Colorado . Operated from 1952 to 1992 , it was under the control of the U.S. Atomic Energy Commission ( AEC ) , succeeded by the Department of Energy ( DOE ) in 1977 . [PAR] [TLE] Rocky Flats National Wildlife Refuge [ SEP ] The Rocky Flats National Wildlife Refuge is a unit of the National Wildlife Refuge System in the United States located approximately 16 mi northwest of Denver , Colorado . The site was previously the Rocky Flats Plant 's security buffer zone and is not currently open to the general public for access .
The Rocky Flats National Wildlife Refuge was previously a buffer zone for a production facility of what?
The Rocky Flats National Wildlife Refuge was previously a buffer zone for a production facility of what ?
nuclear weapons
nuclear weapons