Espionage is complex and expensive, especially when you’re trying to find a needle in a haystack. One impossibly complicated process is finding a “lead”—an individual who can influence a person you want to recruit. It’s like “six degrees of separation,” only the process happens in reverse. Let’s say you want to recruit an Iraqi pilot who flies MIGS. The challenge is finding someone… who knows someone… etc. You start with a deli owner in Paris, whose cousin owns a bar, whose bartender is married to a factory worker, who works with a guy from Iraq, whose brother is a pilot. In this example, the brother of the pilot is The Lead.