BISMARCK, N.D. (AP) -- The day the Legislature approved a smoking ban for most North Dakota businesses, Dennis Laches put a sign on his laundry and television repair shop, announcing he would close when the ban took effect Aug. 1. "Nobody knew if he was going to go through with it," said Troy Mosbrucker, the mayor of Mott, a town of about 800 in southwestern North Dakota. "He had a point to prove, and he proved it." As promised, Laches closed his business that day. He said it had nothing to do with his pack-a-day habit. Rather, he said, it...