Gov. Jerry Brown, left, delivers a speech as Rome Mayor Ignazio Marino, center, and New York Mayor Bill de Blasio listen during a conference on Modern Slavery and Climate Change at the Vatican on Wednesday.
Gov. Jerry Brown, left, delivers a speech as Rome Mayor Ignazio Marino, center, and New York Mayor Bill de Blasio listen during a conference on Modern Slavery and Climate Change at the Vatican on Wednesday. Alessandra Tarantino The Associated Press
Gov. Jerry Brown, left, delivers a speech as Rome Mayor Ignazio Marino, center, and New York Mayor Bill de Blasio listen during a conference on Modern Slavery and Climate Change at the Vatican on Wednesday. Alessandra Tarantino The Associated Press