This week Pope Francis kicks off a five-day trip to Mexico that one bishop says will touch on the moral issues that affect the world. The Vatican released a message saying Pope Francis wants to be “close” to those that are “suffering.” Those people include Mexico’s indigenous populations, refugees, migrants and victims of cartel violence and corruption. But the pope’s visit to Ciudad Juarez at the end of his trip will likely get the most attention. He’s scheduled to celebrate a joint-border Mass for residents of Ciudad Juarez and El Paso and walk to the banks of the Rio Grande, calling attention to the plight of migrants. Why is this visit so significant?