This aircraft with Shaw AFB tailcode ‘JN’ participated in the Vietnam War and was delivered to the museum in 1970. RB-66Bs were reconfigured to provide ESM and ECM support from 1965 to strike aircraft operating over northern Laos and North Vietnam.
This Douglas RB-66B Destroyer flew combat missions in Southeast Asia and was delivered to the museum in 1970. I think the 'JN' fin code and red/white check denotes the 39th TEWS which was based at Shaw AFB SC.
This Douglas WB-66D Destroyer was preserved in the Pima Air & Space Museum in February 1987. She appears to retain her original markings, the "JN" code denoting ownership by the Shaw AFB based 39th TEWTS when she was in service.