¿Donde Esta la Frontera?

After having been out in the wilds, camping and hunting in southern New Mexico with your father-in-law, and both of you are swarthy, with a week's worth of grime and facial hair, when driving home, DO NOT respond to the border patrol checkpoint's question of "are you both U.S. citizens", with "Si". No matter HOW funny you think it is. They have no sense of humor, and you will learn what the business end of a Glock .40 caliber looks like. And your father-in-law will not let you ever forget it.