U.S. companies have been bringing manufacturing home, and with this has come almost a quarter of a million jobs since 2010. And more are on their way — Deloitte reports that about half of U.S. manufacturing executives plan to bring home some portion of their operations by 2020. But there’s a hard truth beneath this positive trend: While domestic manufacturing is near all-time highs, America is not fully prepared to fill the jobs of the future.