Banking on the Dollar: How Iran Keeps $9bn Flowing Through US Banks Despite Sanctions The notion that Washington's sanctions campaign against Iran is airtight has been debunked by recent investigations into Iranian funds flowing through US banks.
Instead of a small leak in an otherwise impenetrable system, what we see is a sophisticated web of financial arrangements designed to keep Tehran flush with cash.
Iran's economic challenges since its oil exports plummeted due to US pressure are well documented.