Pope Francis celebrates a Mass in the American military cemetery in Nettuno, Italy, Thursday, Nov. 2, 2017. Pope Francis is underlining the price of war, visiting an American military cemetery and the site of a Nazi massacre in Rome. The pope will first say Mass in the Sicily-Rome American Cemetery, where 7,680 American war dead who helped liberate southern and central Italy during World War II are buried and 3,095 missing are commemorated. From there, the pope travels to the Ardeatine Caves, the site of one of the worst massacres of Nazi-occupied Rome. (AP Photo/Alessandra Tarantino)