When the Poland national team walk out on to the pitch at their stunning new national stadium in Warsaw on Friday, they will walk with the ghosts of the past in more ways than one.
In his new book, Born On A Mountaintop: On The Road with Davy Crockett and the Ghosts of the Wild Frontier, author Bob Thompson follows in the footsteps of the famous frontiersman in a quest to answer the question, why has the legend of Davy Crockett endured?