Famous people ancestry. President Obama retraced some of his lesser-known ancestral roots to a village in Ireland. One of the president's maternal great-great-great-grandfathers was a shoemaker who immigrated to the United States during the height of a crisis in his homeland. Crowds packed the streets to hear Obama speak as he kicked off a four-nation tour of Europe

Actors and historical characters. We’re all intrigued by the lives of history’s most famous people, and so is Hollywood. John Travolta is the latest star to take on a historical role as a notorious American mobster. Check out this list of actors and actresses who dared to imitate real-life characters.