Young people from around the globe walk in Krakow, Poland, on July 26, 2016 in colourful rain ponchos to a meadow near the city centre where a Catholic mass will kick off the week-long World Youth Days faith extravaganza, for which Pope Francis arrives on Wednesday. Pope Francis heads to Poland Wednesday for an international Catholic youth festival with a mission to encourage openness to migrants made tougher by a fresh jihadist attack in France which has spooked and saddened pilgrims. / AFP PHOTO / JANEK SKARZYNSKI