During President Lincoln's administration, more than a third of the nation's money was counterfeit. On April 14, 1965, the day he would be assassinated, Lincoln established a commission to stop the counterfeiting problem.
The Secret Service evolved into the country's first domestic intelligence and counterintelligence agency. After the assassination of President McKinley in 1901, Congress informally requested that the Secret Service provide presidential protection. In 1902, William Craig became the first agent to be killed riding in the presidential carriage. Now, there are more than 3,200 Secret Service agents.