VATICAN CITY --- Ten years ago when he became the first Pope from Latin America, the former Cardinal Jorge Mario Bergoglio had a sprightly step and a slimmer girth. Today Pope Francis, 86, is using a cane and a wheelchair because of a persistent knee ailment and his waistline has noticeably increased due to a more sedentary lifestyle in the Vatican that began even before his leg problem. But the leader of the world's nearly 1.4 billion Roman Catholics --- marking the 10th anniversary of his pontificate on March 13--- appears to be in good and steady overall health for a man of his age. "You don't run the Church with a knee but with a head," he reportedly told an aide after h...Keep on reading: Francis after 10 years: Slower steps, same resolve