A US auditor has revealed that it is too difficult to untangle how billions of dollars were spent in Afghanistan because of the US agencies' poor recordkeeping. Special inspector general for Afghanistan reconstruction (SIGAR) said in its report that government knows, it awarded nearly 18 billion US dollars in contracts for rebuilding Afghanistan over the last three years, but it can't account for spending before 2007. SIGAR found a lack of coordination among all the U.S. agencies that oversee contracting in Afghanistan and recommended that the Pentagon, the State Department and the U.S. Agency for International Development create one database to track wartime contracts. The report is the latest to criticize the U.S.'s handling of contracts in Afghanistan.