The Financial Crimes Enforcement Network (FinCEN) is a bureau of the U.S. Department of the Treasury. Its primary function is to safeguard the financial system from illicit activities, including money laundering and terrorist financing. FinCEN collects and analyzes information about financial transactions in order to identify and counteract suspicious activities that could potentially threaten national security, public safety, or the integrity of the financial system. The bureau also administers the Bank Secrecy Act, which requires various financial institutions to report their transactions to help authorities combat these crimes. FinCEN’s operations are crucial in upholding the integrity and transparency of the U.S. financial system.