Peter Henning, law professor at Wayne State University, comments in a story about the conviction of WorldCom founder Bernie Ebbers. Henning says federal interest in corporate crimes \"goes in cycles.\" In the 1980s, the federal government prosecuted those who enriched themselves through the sales of \"junk bonds\"; in the late 1980s and early 1990s, it pursued fraud at the nation\'s savings and loans. Over the last few years, federal prosecutors have targeted fraudulent accounting practices like those at WorldCom," Henning says.