Dianne and Carl would have no blood relation, since they are near in age and Feistein is her second husband's namesake.
>http://www.ncix.gov/about.html
Office of the Director of National Intelligence
The National Counterintelligence and Security Center
https://www.dni.gov/index.php/ncsc-home
Might be a good read…2018-2022.
https://www.odni.gov/files/NCSC/documents/Regulations/2018-2022-NCSC-Strategic-Plan.pdf