Public radio had evolved into a source of in-depth news coverage and programming not found on commercial radio stations. While most public radio stations featured classical music, many ventured into alternative music venues not viewed as commercially viable. Jazz, for example, had experienced significant challenges in spite of its steady growth. According to John Corbett in Down Heal magazine, "The road for jazz broad¬casting has been rocky since World War II, passing out of network radio in the 50s, moving into a world of increased specialization and fragmentation." In fact, in late 1994, when Alameda, California based KJAZ went off the air, classic jazz formats ceased to exist on commercial radio.