Afganistan and Iran are neighbours. How can USA interfere in the financial exchanges between these countries? What business has USA got to question the transactions? Why should they unnecessarily pour billions of dollars in Afganistan and Pakistan? Is it not the tax money paid by the Americans? Should it not be used for their welfare? Better vacate Afganistan and Pakistan. Each and every dollar spent here by USA so far and also in future is a waste... and also endangers the security of other countries in the region.