<prompt> Qedela umusho olandelayo: Ukuvikelwa kwabaholi abakhulu abakhethwe isizwe kanye nezinye izikhulu zikahulumeni kungenye yemisebenzi eyinhloko ye-Secret Service. Ngemva kuka-1901  <response>: Ukubulawa kukaMongameli uWilliam McKinley, iCongress yabuye yayala iSecret Service ukuba ivikele uMongameli wase-United States. I-Secret Service iphenya izinkulungwane zezigameko unyaka ngamunye zabantu abasongela umongameli wase-United States. 