How ex-Presidents make there dough

The article explains how presidents such as Harry Truman, Bill Clinton, and jimmy Carter have made money after there presidency concluded. Some notables are Clinton's $250,000 he makes after each speech and Jimmy Carter writing over 20 books including poetry and childrens books. Prior to Harry Truman presidents recieved no pension after there presidency and Truman had to rely on only $112 a month from an army retirement fund.