Secret Intelligence Service (SIS) / Military Intelligence, Section 6 (MI6)

`Секретна розвідувальна служба` (служба зовнішньої розвідки Великої Британії)

Military Intelligence, Section 6 (MI6)

Security Service / Military Intelligence, Section 5 (MI5)

secret defense service

secret agent intelligence

be drawn from secret intelligence

Military Intelligence, Section 5 (MI5)

branch (military/service branch, armed service)

MIVD (Militaire Inlichtingen- en Veiligheidsdienst / Dutch Military Intelligence and Security Service)

secret (security classification)

secret internet protocol router network (SIPRNET)

top secret (security classification)

be marked top secret

foreign secret agent

give away the secret by careless talk

clearance for top secret work

secret clearance

secret language

secret qualification clearance

secret security clearance

echoing cross-section; echoing cross section

section of control surface section

radar cross-section / radar cross section (RCS); radar signature; radar crossover

air and space doctrine (section of military doctrine)