https://www.jpost.com/Middle-East/Iran-increases-Hamas-funding-in-exchange-for-intel-on-Israel-missiles-597836

https://www.cbsnews.com/news/obama-administration-acknowledges-1-7-billion-transfer-to-iran-was-all-cash/

https://www.theguardian.com/world/2007/feb/08/usa.iraq1