CBRN defense - Wikipedia
https://en.wikipedia.org/wiki/CBRN_defense
Etymology. In English the term CBRN is a replacement for the cold war term NBC (nuclear, biological, and chemical), which had replaced the term ABC (atomic, biological, and chemical) that was used in the fifties. The addition of the R (for radiological) is a consequence of the "new" threat of a radiological weapon (also known as "dirty bombs"). In the new millennium, the term …
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