The letter X is the most known symbol of straight edge, and is sometimes worn as a marking on the back of both hands, though it can be displayed on other body parts as well. Some followers of straight edge have also incorporated the symbol into clothing and pins. According to a series of interviews par journalist Michael Azerrad, the straight edge X can be traced to the Teen Idles' brief U.S. West Coast tour in 1980. The Teen Idles were scheduled to play at San Francisco's Mabuhay Gardens, but when the band arrived, club management discovered that the entire band was under the legal drinking...