Book excerpt: Al Capone. The Untouchables. The Valentine's Day massacre. You may think you know everything about the Roaring Twenties in the Windy City, but in the early twentieth century, the harsh environment of the Maxwell Street ghetto produced a proliferation of Jewish gangsters involved in everything from labor racketeering to white slavery. Their illegal activity offended their own community's value system and sparked rifts between Reform and Orthodox Jews. It also ignited tensions between city officials and Jewish leaders, indelibly marked the gentile population's perception of Chicago's Jews and shaped the city's West Side for years to come.