tonight, francis is jumping into the fight over immigration. as he celebrates mass just across the rio grande from texas. and manuel bojorquez is there. >> reporter: his strongest stand yet in solidarity with migrants. he is addressing their plight at this mass before 200,000 in juarez calling it a humanitarian crisis. across the border in el paso, a crowd of 30,000 watched the mass, a symbolic event for two and connected here by a choir come the prized of people from both side -- come the prized of people from both side. like americans, flor and anna garcia from el paso. we feel as part of both communities as we go back and forth often. >> reporter: the mother and daughter have seen the ravages of violence in juarez fueled by cartels and human smugglers. problems pope francis is a dressing head on. >> going to all the places people are struggling showing he is there, shows that even in the darkest moments there is the brightest light. >> reporter: it is also a powerful moment for this massive crowd behind me. scott, on immigration, pope franci