I stood there in amazement, wiping the sweat off my brows, watching a group of guys working together with such professional efficiency that you'd think they were actual drywallers. As I took a puff of my cigarette, there was Reg pushing another piece of gypsum board over the two-by-four framework and Rob lifting the other end into place. Meanwhile, Joe and Harvey had just finished hammering another slab into place. We were building a wall! The great wall of AA, I thought.