From the Middle East to Europe to Africa, the money trail is another front of the battle against terror. Terrorist organizations, such as Hezbollah and Hamas, bankrolled by Iran, move money invisibly through banks, trade networks, investments, cryptocurrencies, and even charities. Their financial pipelines are as dangerous as their physical weapons. Two decades ago, Sheikh Yusuf al-Qaradawi, the Egyptian cleric in exile in Qatar, showed how deep such systems could run. His 'Union of Good'