Parishes in Europe increasingly headed by priests from former missions

As the world's largest religion, Christianity is undergoing a tectonic shift. It is booming in Africa, now the continent with the most followers, and waning in Europe. Countries like Spain, which for centuries sent their missionaries to evangelise the world, now rely on priests from abroad to come preach at home - a trend some call "reverse missions." Alan Ruiz Terol reports on how this phenomenon has translated to the Catholic parish in his own hometown.