Catholic Review File Photo There were countless angles a journalist could have taken in writing a preview story about Pope John Paul II’s historic visit to Baltimore in 1995. Christopher Gaul, then the senior writer at the Catholic Review who later became the newspaper’s managing editor, decided to examine what others ignored: the source of the 80,000 Communion hosts that would be consecrated during the Oct. 8 papal Mass at Oriole Park at Camden Yards. Gaul traced the story all the way back to a Kansas wheat field, where grains were harvested and shipped by railcar to New Jersey to...