Vatican Cardinal Pell to stand trial on sex assault charges
Australian police have charged Pell, 76, with multiple counts of sexual assault.
The pop star and "American Idol" judge met Pope Frances at the Vatican, joined by her mom and Orlando Bloom.
McCain and Vieira will attend an international conference on health care in Vatican City, Italy.
Cardinal George Pell faces multiple charges of sexual offenses, dating back to his time as young priest in Australia.
Cardinal George Pell, one of Pope Francis' top advisers, has forcefully denied charges in his native Australia that allege he committed sexual assault years ago.
Trump and Pope Francis met for around 30 minutes in the pope's private library at the Vatican and ended their high-profile meeting with a handshake.
Trump told the Pope, "Thank you, I won't forget what you said," after their private meeting.
ABC News' Devin Dwyer and Jordyn Phelps recap the president's morning at the Vatican.
President Trump's visit to the Vatican is the third stop of the president's tour of sites representing three major religions.
Benedict XVI, who resigned as pope in 2013, has celebrated his 90th birthday with a mug of beer and visitors from his native Germany