John Sopko, special inspector general for Afghanistan reconstruction, testifies on Capitol Hill last June. In a letter released Thursday, Sopko says the U.S. may have been paying for "ghost schools, ghost students and ghost teachers" in Afghanistan. Charles Dharapak/AP hide caption

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Photos depict scenes at the $34 million command center in Camp Leatherneck, completed in November. U.S. troops will never use the facility, the Special Inspector General for Afghanistan Reconstruction says. SIGAR hide caption

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