financial flows can disrupt and disable these networks. . 3. GAO study on synthetic drugs trafficking (a) Study The Comptroller General of the United States shall conduct a study on illicit financing in connection with the trafficking of synthetic drugs, including fentanyl and methamphetamine, fentanyl- and methamphetamine-related substances, Captagon, and fentanyl and methamphetamine precursors, that includes— (1) the business of the trafficking of synthetic drugs and related illicit finance, such as the participation of transnational criminal organizations and terror syndicates and their notable trafficking corridors, including source and transit countries