Pope Francis is on his way from Italy to World Youth Day 2013 which begins soon in Rio de Janeiro, Brazil. He carried his own bag on to the plane.
World Youth Day is an international event for young Catholics that was initiated by Pope John Paul II in 1985 and has been celebrated internationally every two to three years since, at different locations around the world. Attentdance at the first (Rome, Italy) was approximately 300,000. In 2011 (Madrid, Spain), attendance was approximately 1,500,000.
Sources:
polination.blog 