USA Secret Service was made with idea to solve financial frauds, and not to protect the president.
It was found in the day when President Abraham Lincoln was murdered – the idea was presented to him on April 14th 1865, and just few hours later he was not alive. In 243 years, which is the time they operate, only one agent lost his life during the service and he was protecting Harry Truman. For every USA president Secret Service has coded name, and the building they work in has no specified signs or marks. It is a regular building located in Washington.