 |
| |||
| undercover operation | |||
| human source operation (normally clandestine in nature Alex_Odeychuk); source operation (в агентурной разведке, в контрразведке Alex_Odeychuk) | |||
| агентурная операция: 4 phrases in 3 subjects |
| Intelligence and security services | 2 |
| Military | 1 |
| Security systems | 1 |