I learned a lot from a great friend over coffee just outside of the gates of Ft. Lewis. Until my eyes started drifting over to more interesting sights in the coffee shop.
Hi Bismark !
That's not too far fetched. Most of Humint today is little more than common sense and eyes open. DIAs course goes farther with lessons and experiences over the last 25 years. That "book" at AKO is much the same. The folks that put that together are former Army NCOs and Officers who once worked for DIA.

Regards, Stan