By NICOLE WINFIELD, BARRY HATTON and PIETRO DE CRISTOFARO (Associated Press) LISBON, Portugal (AP) — An estimated 1.5 million young people filled a field in the Portuguese capital Lisbon on Saturday for Pope Francis’ World Youth Day vigil, braving scorching heat to secure a spot for the evening prayer and to camp out overnight for his final farewell Mass on Sunday morning. Francis made only brief remarks before them, however, and ditched his prepared speech for the fourth time in two days.