The United States has spent nearly half a billion dollars and five years developing Afghanistan’s oil, gas and minerals industries — and has little to show for it, a government watchdog reported today. The project’s failings are the result of poorly planned programs, inadequate infrastructure and a challenging partnership with the Afghan government, the Special Inspector General for Afghanistan Reconstruction wrote in its newest damning assessment of U.S. efforts in the war-torn country. The finding comes after some 200 SIGAR reports have detailed inefficient, unsuccessful or downright wasteful reconstruction projects. A recent ProPublica analysis of the reports found that there has been at least $17 billion in questionable spending.