From Michael Schwarz:

A Russian soldier comes home after years as a POW in Afghanistan. He tells his story: “I was cold, hungry, beaten, tortured and interrogated every day.”  Asked if he confessed to anything, the soldier says,  “Not a word, they would beat me and beat me but I simply told them again and again I do not know how the AK47 is designed. They got nothing out of me.”

“Very good,” his commanders were pleased.  They asked the soldier if he has any words of advice to the new recruits, and the soldier replied, “Yes.  You should pay close attention when they teach you the design of AK47.”