Secretary of State Antony Blinken, center, accompanied by tour guide Alessandro Conforti, right, and Chargé d'Affaires of the U.S. Embassy to the Holy See Patrick Connell, left, gets a tour of the Sistine Chapel at the Vatican in Rome, Monday, June 28, 2021. Blinken is on a week long trip in Europe traveling to Germany, France and Italy. (AP Photo/Andrew Harnik, Pool)

Pope Francis shakes hands with Secretary of State Antony Blinken, as they meet at the Vatican, Monday, June 28, 2021. Blinken is on a week long trip in Europe traveling to Germany, France and Italy. (Vatican Media via AP Photo)

Secretary of State Antony Blinken, right, accompanied by Chargé d'Affaires of the U.S. Embassy to the Holy See Patrick Connell, left, gets a tour of the Sala Regia at the Vatican in Rome, Monday, June 28, 2021. Blinken is on a week long trip in Europe traveling to Germany, France and Italy. (AP Photo/Andrew Harnik, Pool)

Pope Francis exchange gifts with Secretary of State Antony Blinken, as they meet at the Vatican, Monday, June 28, 2021. Blinken is on a week long trip in Europe traveling to Germany, France and Italy. (Vatican Media via AP Photo)

Secretary of State Antony Blinken, right, accompanied by tour guide Alessandro Conforti, second from right, and Chargé d'Affaires of the U.S. Embassy to the Holy See Patrick Connell, left, gets a tour of the Sala Regia at the Vatican in Rome, Monday, June 28, 2021. Blinken is on a week long trip in Europe traveling to Germany, France and Italy. (AP Photo/Andrew Harnik, Pool)

Pope Francis shakes hands with Secretary of State Antony Blinken, as they meet at the Vatican, Monday, June 28, 2021. Blinken is on a week long trip in Europe traveling to Germany, France and Italy. (Vatican Media via AP Photo)

Secretary of State Antony Blinken, right, accompanied by Chargé d'Affaires of the U.S. Embassy to the Holy See Patrick Connell, left, gets a tour of the Sala Regia at the Vatican in Rome, Monday, June 28, 2021. Blinken is on a week long trip in Europe traveling to Germany, France and Italy. (AP Photo/Andrew Harnik, Pool)

Secretary of State Antony Blinken, left, accompanied by tour guide Alessandro Conforti, right, and Chargé d'Affaires of the U.S. Embassy to the Holy See Patrick Connell, second from left, gets a tour of the Sistine Chapel at the Vatican in Rome, Monday, June 28, 2021. Blinken is on a week long trip in Europe traveling to Germany, France and Italy. (AP Photo/Andrew Harnik, Pool)

Pope Francis exchange gifts with Secretary of State Antony Blinken, as they meet at the Vatican, Monday, June 28, 2021. Blinken is on a week long trip in Europe traveling to Germany, France and Italy. (Vatican Media via AP Photo)

Pope Francis and Secretary of State Antony Blinken meet at the Vatican, Monday, June 28, 2021. Blinken is on a week long trip in Europe traveling to Germany, France and Italy. (Vatican Media via AP Photo)

Secretary of State Antony Blinken, left, accompanied by tour guide Alessandro Conforti, right, and Chargé d'Affaires of the U.S. Embassy to the Holy See Patrick Connell, center, gets a tour of the Sala Regia at the Vatican in Rome, Monday, June 28, 2021. Blinken is on a week long trip in Europe traveling to Germany, France and Italy. (AP Photo/Andrew Harnik, Pool)

Pope Francis talks with Secretary of State Antony Blinken, as they meet at the Vatican, Monday, June 28, 2021. Blinken is on a week long trip in Europe traveling to Germany, France and Italy. (Vatican Media via AP Photo)

Secretary of State Antony Blinken, center, accompanied by tour guide Alessandro Conforti, right, and Chargé d'Affaires of the U.S. Embassy to the Holy See Patrick Connell, left, gets a tour of the Sala Regia at the Vatican in Rome, Monday, June 28, 2021. Blinken is on a week long trip in Europe traveling to Germany, France and Italy. (AP Photo/Andrew Harnik, Pool)