Think Like a Spy

Many people have wished or dreamed about the possibility of doing espionage, and movies surely stimulate such desire. But my experience of living in some of the worst neighborhoods in the world left me with little desire to ever be in such situation again.
However, there are many forms of espionage in our modern world, and not just the types that we often see in movies. Among those, we have the ones we're forced to learn, in order to find evidences against a cheating partner, or to protect o...