A man interviews for a job in Detroit. The unemployment rate for black Americans in Michigan was 18.7 percent in 2012, more that twice the rate for whites in the state. Paul Sancya/AP hide caption

itoggle caption Paul Sancya/AP

Enzo Vizcaíno, a 24-year-old unemployed Spaniard, isn't singing for his supper. He just wants a job. mrenzovic/youtube.com hide caption

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Looking for work: The scene at a job fair in New York City earlier this year. Figures on job growth and unemployment in April are due Friday morning. Shannon Stapleton /Reuters /Landov hide caption

itoggle caption Shannon Stapleton /Reuters /Landov

In Denver last month, a recruiter (right) talked with a job seeker at a health care career fair. There was job growth in April, according to a new survey, but the pace was modest. Rick Wilking /Reuters /Landov hide caption

itoggle caption Rick Wilking /Reuters /Landov

Li-Wen Hung (left) and Whitney Chen were waiting to meet potential employers at a Manhattan job fair earlier this year. Mario Tama/Getty Images hide caption

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Will there be more signs like this? An automotive service shop in El Cerrito, Calif., was looking for workers last month. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images