SCOTT JOHNSON LEANS round the corner of a cinder-block building to peer at the wrecks in back. Abandoned grain elevators loom behind him, and up and down the street ratty signs advertise businesses devoted to spent industry. "I guess this is it," he says, opening the metal door to the office at Atlas Auto Parts near downtown St. Paul. I follow, his assistant on this adventure in thrift. Inside the air is thick with the aroma of old grease. Veteran parts, marked with smeared manila tags, line the walls. Scott moves up to a counter littered with Taco Bell wrappers and makes eye contact with the... More >>>