THE SCENE OF A TRAGEDY IN THIS COUNTRY. WE'RE GOING TO TURN IN THE MEANTIME TO THE CELEBRATING HEADLIGHT TONIGHT INVOLVING POPE FRANCIS IN THE HOSPITAL TONIGHT WITH A LUNG INFECTION. HERE'S OUR FOREIGN CORRESPONDENT WITH LATE REPORTING TONIGHT. >> Reporter: A TONIGHT PRAYERS AROUND THE WORLD FOR POPE FRANCIS WHO HAS BEEN HOSPITALIZED IN ROME FOR A LUNG INFECTION, THE VATICAN REVEALING THE 86-YEAR-OLD PONTIFF COMPLAINED OF RESPIRATORY DIFFICULTIES IN RECENT DAYS AND WENT IN FOR TESTS. SEVERAL DAYS OF APPROPRIATE MEDICAL TREATMENT. AS A YOUNG MAN HE HAD PART OF A LUNG REMOVED AFTER A SEVER CASE OF PNEUMONIA. >> THE LESS LUNG CAPACITY YOU HAVE THE LESS PULMONARY RESERVE YOU HAVE AND THAT MAY CONTRIBUTE TO RISK FOR THIS PARTICULAR INFECTION. >> Reporter: TODAY'S NEWS COMES AFTER THE POPE'S WEEKLY AUDIENCE WHERE HE APPEARED ENERGETIC AND ENGAGING, IN ST. PETER'S SQUARE KISSING BABIES AND POSING FOR PHOTOGRAPHS. >> SINCE HE WAS OUT AND ABOUT THIS MORNING THAT WOULD IMPLY THAT HE HAD OUTPATIENT PNEUMONIA WHICH IS NOT NECESSARILY SERIOUS. HOWEVER, HE IS THE POPE AND YOU MIGHT WANT TO HAVE THEM IN THE HOSPITAL UNTIL THINGS CLEAR UP. >> Reporter: HE HAS BEEN FACING OTHER HEALTH CHALLENGES, HE'S RELYING ON A CANE IN A WHEELCHAIR TO GET AROUND AFTER KNEE INJURY AND HE'S BEEN DEALING WITH THE RETURN OF A CONDITION AFTER INTESTINAL SURGERY BACK IN 2021. TONIGHT, THE FAITHFUL ARE PRAYING FOR HIS RECOVERY. >> THIS POPE, I LOVE HIM, I ADORE HIM. WE WANT TO POPE FRANCIS TO GET BETTER. >> Reporter: THE VATICAN SAYS THE POPE IS TOUCHED BY THE MANY MESSAGES HE'S RECEIVED AND IS TOUCHED BY THE GRATITUDE. IT'S NOT CLEAR HOW LONG THE PUP IS GOING TO BE HOSPITALIZED BUT THE CATHOLIC CHURCH IS HEADING INTO ITS BUSIEST TIME OF THE YEAR, THEY'RE ALL KINDS OF CELEBRATIONS TO BE PRESIDED OVER AND THAT STARTS WITH