A group of nuns prays at Namugongo Martyrs' Shrine during an open air mass held by Pope Francis on November 28, 2015. Pope Francis arrived in Uganda on November 27 on the second leg of a landmark trip to Africa which has seen him railing against corruption and poverty, with huge crowds celebrating his arrival. AFP PHOTO / GIUSEPPE CACACE / AFP / GIUSEPPE CACACE        (Photo credit should read GIUSEPPE CACACE/AFP/Getty Images)