July 26, 2011. (Romereports.com) (-ONLY VIDEO-) Preparation is underway at the Cuatro Vientos airfield to greet the more than 1,200,000 pilgrims attending the World Youth Day. There are 270 acres of land, equivalent to 48 soccer fields. The night vigil will be held here on Saturday evening. Thousands of youth will be camping out to attend the WYD closing Mass on Sunday, presided over by Benedict XVI.