article: United States Secret Service
links: Vice President of the United States President of the United States Vice President-elect of the United States President-elect of the United States Washington, D.C. White House United States presidential line of succession Number One Observatory Circle Second Ladies and Gentlemen of the United States Director of the United States Secret Service United States Department of the Treasury Assassination of William McKinley First Lady of the United States President United States Department of Homeland Security United States Congress Sean M. Curran Abraham Lincoln