Why is the Pope doing a long tour when he's so frail?

Pope Francis, who has often appeared to revel in confounding and surprising others, is at it again.Many times over the years, he has seemed to suggest he is slowing down, only to ramp up his activities again. At nearly 88 years old, he has a knee ailment that impairs mobility, abdominal problems caused by diverticulitis and is vulnerable to respiratory issues owing to the removal of most of one