Leo's discharge capped days of uncertainty that rattled the Vatican and the world's 1.4 billion Catholics. VATICAN CITY - A smiling Pope Leo left hospital in Rome on Saturday afternoon and returned to the Vatican four days after surgery for lung cancer, an illness that has prompted speculation about how his 17-month papacy might change. Key points and original sources are listed below.

• Leo's discharge capped days of uncertainty that rattled the Vatican and the world's 1.4 billion Catholics.S1

• VATICAN CITY - A smiling Pope Leo left hospital in Rome on Saturday afternoon and returned to the Vatican four days after surgery for lung cancer, an illness that has prompted speculation about how his 17-month papacy might change.S2