Created in 1981 after the failed Operation Eagle Claw rescue mission, ISA was formed to provide critical human and signal intelligence (HUMINT and SIGINT) for missions led by elite forces like ...

12 - human resouces (HUMINT) 13 - imagery (IMINT) 14 - measurement and signature (MASINT) 15 - medical (MEDINT) 16 - open-source (OSINT) 17 - scientific and technical (S&TI) 18 - signals (SIGINT ...

However, most documents dealing with HUMINT sources and SIGINT methods usually fall under several exemption codes and are not automatically declassified at any point in time. It remains hotly ...