1861President-elect Abraham Lincoln arrived secretly in Washington, D.C., after the thwarting of an alleged assassination plot in Baltimore. Lincoln was en route to his inauguration. Allan Pinkerton, founder of the Pinkerton National Detective Agency, played a key role by managing Lincoln's security detail throughout the journey. At the time, many thought that Lincoln’s concern with assassination attempts showed lack of courage.1905Chicago attorney Paul Harris and three other businessmen met for lunch to form the …