KnowraHuman intelligenceLinked fromLinked fromThe 11 pages that link to Human intelligence, each with the reason it gives.All 11Broader topic 2Related 3Narrower topic 3Compared with 3DefectionNarrower topic: Defectors can provide human intelligence unavailable through surveillance or documents.MI6Narrower topic: Recruiting and handling people overseas is a central way SIS obtains secret information.Oleg PenkovskyNarrower topic: Penkovsky was a human source whose access came from his Soviet military position.