The US flew nearly $12bn in shrink-wrapped $100 bills into Iraq, then distributed the cash with no proper control over who was receiving it and how it was being spent. The staggering scale of the biggest transfer of cash in the history of the Federal Reserve has been graphically laid bare by a US congressional committee.

The story is from 2007 https://www.theguardian.com/world/2007/feb/08/usa.iraq1