<Tr> <Th_colspan="2"> Website </Th> </Tr> <Tr> <Td_colspan="2"> www.secretservice.gov </Td> </Tr> <P> The United States Secret Service (also USSS or Secret Service) is a federal law enforcement agency under the United States Department of Homeland Security, charged with conducting criminal investigations and protecting the nation's leaders . Until 2003, the Service was part of the U.S. Department of the Treasury, as the agency was originally founded to combat the then - widespread counterfeiting of U.S. currency . </P> <P> The U.S. Secret Service is tasked with two distinct and critical national security missions: </P>

What is the function of the secret service