Madrid's archbishop, Cardinal Antonio Maria Rouco Varela (L) kisses the hands of Pope Benedict XVI as he celebrates a mass at the Almudena Cathedral during the World Youth Day (WYD) festivities in Madrid on August 20, 2011. The pope will hold a "Prayer Vigil" in the evening at an airbase southwest of the capital, where the pilgrims will spend the night under the stars on an esplanade the size of 48 football pitches. AFP PHOTO/ VINCENZO PINTO