Robert Prevost, an missionary who spent his career ministering in Peru and took over the Vatican’s powerful office of bishops, was elected the first pope from the United States in the 2,000-year history of the Catholic Church.

What began as a festive campaign march quickly turned into a scene of terror in the Mexican state of Veracruz on Sunday night when a mayoral candidate was gunned down alongside three other people.

Hundreds filled the pews in Oakland at Saint Paul Cathedral to watch Bishop David Zubik give his “Mass of Thanksgiving” for Pope Leo the 14th.