Houston, one of the bright spots in the U.S. economy, is growing so fast that business leaders fear running out of skilled labor as billions are spent building new energy infrastructure on the Gulf Coast.

Of the top 20 metro areas, Houston's pace of job growth in the 12-months through May was the second-fastest in the country at 3.3 percent, behind only Dallas at 3.7 percent, according to the U.S. Bureau of Labor Statistics.

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