Story : REAGAN'S COWBOYS: Why have successive presidents celebrated the cowboy as all-American hero? THE AGE OF CHIVALRY IS DEAD: But did it ever flourish? How true is the picture painted of the knights in shining armour, enchanted castles and fabulous tournaments in medieval romance. THE HIDDEN HIPPOPOTAMUS: A hundred years ago the scramble for Africa by the European imperial powers began. Timewatch reconstructs a single incident between Christian missionary and African chieftain that suggests the dominance of European over African was not always as straightforward as might be thought.