This is the final installment of the series of articles profiling the five men who will be ordained to the priesthood for the Archdiocese of Boston at the Cathedral of the Holy Cross on May 22. BRIGHTON -- "If not me, then who?" That was the question that motivated Deacon David Campo in his discernment of the priesthood, and specifically to military chaplaincy. Growing up in a Catholic family in the Milton/Quincy area, he and his two younger brothers attended St. Agatha School and Boston College High School. Their parents' work ethic shaped their approach to school, Boy Scouts, community service, sports, and work.