Open this photo in gallery: Jack Harrison, right, the veteran thought to be the last survivor of the World War II prisoner-of-war breakout from Stalag Luft III, with other prisoners-of-war in this undated file photo.Erskine Observances were held in Poland on Sunday to mark the 80th anniversary of the “Great Escape,” an ingenious act of defiance during World War II in which 76 prisoners of war tunnelled out of a German prisoner-of-war camp into a snowy forest. A solemn roll call of remembrance was held in ?aga?, where the former POW camp is now a museum, according to state broadcaster...