A U.S. Senate investigation found something striking about Iran’s crypto activity. Investigators analyzed 846 wallets sanctioned or targeted over links to Iran and its proxies. 84% of them used USDT almost exclusively. The report says USDT has been used to move money around sanctions, support Iran’s shadow banking system and facilitate payments connected to groups such as Hezbollah. Tether says it has already frozen nearly $550M in Iran-linked USDT this year and is cooperating with law enforcement.