A new recruit of the Vatican's elite Swiss Guard arrives to partecipate at the swearing-in ceremony at the Vatican, May 6, 2023. REUTERS/Remo Casilli 

New recruits of the Vatican's elite Swiss Guard prepare for the swearing-in ceremony at the Vatican, May 6, 2023. REUTERS/Remo Casilli 

New recruits of the Vatican's elite Swiss Guard prepare for the swearing-in ceremony at the Vatican, May 6, 2023. REUTERS/Remo Casilli 

Kai Wegner of the Christian Democratic Union party CDU raises his hand during the swearing-in ceremony as the new Mayor of Berlin, Germany, April 27, 2023. REUTERS/Michele Tantussi 

Kai Wegner of the Christian Democratic Union party CDU raises his hand during the swearing-in ceremony as the new Mayor of Berlin, Germany, April 27, 2023. REUTERS/Michele Tantussi 

Kai Wegner of the Christian Democratic Union party CDU raises his hand during the swearing-in ceremony as the new Mayor of Berlin, Germany, April 27, 2023. REUTERS/Michele Tantussi 

U.S. Treasury Secretary Janet Yellen delivers remarks at the ceremonial swearing-in of Internal Revenue Service (IRS) Commissioner Danny Werfelin at the Internal Revenue Service Headquarters Building in Washington, U.S, April 4, 2023. REUTERS/Kevin Lamarque 

U.S. Treasury Secretary Janet Yellen delivers remarks at the ceremonial swearing-in of Internal Revenue Service (IRS) Commissioner Danny Werfelin at the Internal Revenue Service Headquarters Building in Washington, U.S, April 4, 2023. REUTERS/Kevin Lamarque 

U.S. Treasury Secretary Janet Yellen delivers remarks at the ceremonial swearing-in of Internal Revenue Service (IRS) Commissioner Danny Werfelin at the Internal Revenue Service Headquarters Building in Washington, U.S, April 4, 2023. REUTERS/Kevin Lamarque 

Internal Revenue Service (IRS) Commissioner Danny Werfelin speaks after being ceremonially sworn-in by Treasury Secretary Janet Yellen at the Internal Revenue Service Headquarters Building Washington, U.S, April 4, 2023. REUTERS/Kevin Lamarque 

Internal Revenue Service (IRS) Commissioner Danny Werfelin speaks after being ceremonially sworn-in Washington, U.S, April 4, 2023. REUTERS/Kevin Lamarque 

U.S. Treasury Secretary Janet Yellen conducts the ceremonial swearing-in of Internal Revenue Service (IRS) Commissioner Danny Werfelin, as his wife Beth stands at his side, in Washington, U.S, April 4, 2023. REUTERS/Kevin Lamarque 

U.S. Treasury Secretary Janet Yellen conducts the ceremonial swearing-in of Internal Revenue Service (IRS) Commissioner Danny Werfelin, as his wife Beth stands at his side, in Washington, U.S, April 4, 2023. REUTERS/Kevin Lamarque 

Lord Carloway who presided over the swearing in of Humza Yousaf as First Minister of Scotland at the Court of Session, Edinburgh. Picture date: Wednesday March 29, 2023. Jane Barlow/Pool via REUTERS 

Zhang Youxia (front), newly-elected Vice Chairman of the Central Military Commission of the People's Republic of China, swears an oath with members of the Central Military Commission after they were elected during the fourth plenary session of the National People's Congress (NPC) at the Great Hall of the People in Beijing on March 11, 2023. GREG BAKER/Pool via REUTERS 

Zhang Youxia (C), newly-elected Vice Chairman of the Central Military Commission of the People's Republic of China, swears an oath with Central Military Commission members He Weidong and Li Shangfu after they were elected during the fourth plenary session of the National People's Congress (NPC) at the Great Hall of the People in Beijing on March 11, 2023. GREG BAKER/Pool via REUTERS 

Zhang Youxia (front), newly-elected Vice Chairman of the Central Military Commission of the People's Republic of China, swears an oath with members of the Central Military Commission after they were elected during the fourth plenary session of the National People's Congress (NPC) at the Great Hall of the People in Beijing, China on March 11, 2023. GREG BAKER/Pool via REUTERS 

Czech President Petr Pavel leaves after swearing on the Czech Constitution, during the inauguration ceremony at Prague Castle in Prague, Czech Republic, March 9, 2023. REUTERS/Eva Korinkova 

Czech President Petr Pavel greets people next to his wife, Eva Pavlova, after swearing on the Czech Constitution, during the inauguration ceremony at Prague Castle in Prague, Czech Republic, March 9, 2023. REUTERS/Eva Korinkova 

Czech President Petr Pavel greets people next to his wife, Eva Pavlova, after swearing on the Czech Constitution, during the inauguration ceremony at Prague Castle in Prague, Czech Republic, March 9, 2023. REUTERS/Eva Korinkova 

Czech President Petr Pavel greets people next to his wife, Eva Pavlova, after swearing on the Czech Constitution, during the inauguration ceremony at Prague Castle in Prague, Czech Republic, March 9, 2023. REUTERS/Eva Korinkova 

Czech President Petr Pavel leaves after swearing on the Czech Constitution, during the inauguration ceremony at Prague Castle in Prague, Czech Republic, March 9, 2023. REUTERS/Eva Korinkova 

Newly elected Czech President Petr Pavel swears on the Czech Constitution during the inauguration ceremony at Prague Castle in Prague, Czech Republic, March 9, 2023. REUTERS/Eva Korinkova 

Czech President Petr Pavel speaks, after swearing on the Czech Constitution, during the inauguration ceremony at Prague Castle in Prague, Czech Republic, March 9, 2023. REUTERS/Eva Korinkova 

Czech President Petr Pavel speaks, after swearing on the Czech Constitution, during the inauguration ceremony at Prague Castle in Prague, Czech Republic, March 9, 2023. REUTERS/Eva Korinkova 

Czech President Petr Pavel speaks, after swearing on the Czech Constitution, during the inauguration ceremony at Prague Castle in Prague, Czech Republic, March 9, 2023. REUTERS/Eva Korinkova 

Czech President Petr Pavel signs an oath after swearing on the Czech Constitution, during the inauguration ceremony at Prague Castle in Prague, Czech Republic, March 9, 2023. REUTERS/Eva Korinkova 

Newly elected Czech President Petr Pavel swears on the Czech Constitution during the inauguration ceremony at Prague Castle in Prague, Czech Republic, March 9, 2023. REUTERS/Eva Korinkova 

Newly elected Czech President Petr Pavel swears on the Czech Constitution during the inauguration ceremony at Prague Castle in Prague, Czech Republic, March 9, 2023. REUTERS/Eva Korinkova 

Brazil's President-elect Luiz Inacio Lula da Silva, Vice President Geraldo Alckmin and Aloizio Mercadante attend Mercadante's swearing-in ceremony as President of the Brazilian National Development Bank (BNDES) in Rio de Janeiro, Brazil, February 6, 2023. REUTERS/Ricardo Moraes 

Brazil's President-elect Luiz Inacio Lula da Silva, Vice President Geraldo Alckmin and Aloizio Mercadante attend Mercadante's swearing-in ceremony as President of the Brazilian National Development Bank (BNDES) in Rio de Janeiro, Brazil, February 6, 2023. REUTERS/Ricardo Moraes 

Brazil's President-elect Luiz Inacio Lula da Silva and his wife Rosangela "Janja" da Silva attend the swearing-in ceremony of Aloizio Mercadante as President of the Brazilian National Development Bank (BNDES) in Rio de Janeiro, Brazil, February 6, 2023. REUTERS/Ricardo Moraes 

Brazil's President-elect Luiz Inacio Lula da Silva and Vice President Geraldo Alckmin attend the swearing-in ceremony of Aloizio Mercadante as President of the Brazilian National Development Bank (BNDES) in Rio de Janeiro, Brazil, February 6, 2023. REUTERS/Ricardo Moraes 

Brazil's President-elect Luiz Inacio Lula da Silva speaks during the swearing-in ceremony of Aloizio Mercadante as President of the Brazilian National Development Bank (BNDES) in Rio de Janeiro, Brazil, February 6, 2023. REUTERS/Ricardo Moraes 

Aloizio Mercadante attends his swearing-in ceremony as President of the Brazilian National Development Bank (BNDES) in Rio de Janeiro, Brazil, February 6, 2023. REUTERS/Ricardo Moraes 

Brazil's President-elect Luiz Inacio Lula da Silva reacts during the swearing-in ceremony of Aloizio Mercadante as President of the Brazilian National Development Bank (BNDES) in Rio de Janeiro, Brazil, February 6, 2023. REUTERS/Ricardo Moraes 

Brazil's President-elect Luiz Inacio Lula da Silva attends the swearing-in ceremony of Aloizio Mercadante as President of the Brazilian National Development Bank (BNDES) in Rio de Janeiro, Brazil, February 6, 2023. REUTERS/Ricardo Moraes 

Brazil's President-elect Luiz Inacio Lula da Silva attends the swearing-in ceremony of Aloizio Mercadante as President of the Brazilian National Development Bank (BNDES) in Rio de Janeiro, Brazil, February 6, 2023. REUTERS/Ricardo Moraes 

Aloizio Mercadante speaks during his swearing-in ceremony as President of the Brazilian National Development Bank (BNDES) in Rio de Janeiro, Brazil, February 6, 2023. REUTERS/Ricardo Moraes 

Aloizio Mercadante speaks during his swearing-in ceremony as President of the Brazilian National Development Bank (BNDES) in Rio de Janeiro, Brazil, February 6, 2023. REUTERS/Ricardo Moraes 

Brazil's President-elect Luiz Inacio Lula da Silva and Aloizio Mercadante attend Mercadante's swearing-in ceremony as President of the Brazilian National Development Bank (BNDES) in Rio de Janeiro, Brazil, February 6, 2023. REUTERS/Ricardo Moraes 

Brazil's President-elect Luiz Inacio Lula da Silva talks with Aloizio Mercadante during his swearing-in ceremony as President of the Brazilian National Development Bank (BNDES) in Rio de Janeiro, Brazil, February 6, 2023. REUTERS/Ricardo Moraes 

U.S. Senator Pete Ricketts (R-NE) and Vice President Kamala Harris greet Ricketts' mother Marlene Ricketts during a mock swearing-in ceremony at the U.S. Capitol in Washington, U.S., January 23, 2023. REUTERS/Nathan Howard 

U.S. Senator Pete Ricketts (R-NE) poses for a photo with his father Joe Ricketts, his wife Susanne Shore, his mother Marlene Ricketts and Vice President Kamala Harris, following a mock swearing-in ceremony at the U.S. Capitol in Washington, U.S., January 23, 2023. REUTERS/Nathan Howard 

U.S. Senator Pete Ricketts (R-NE) and his sister-in-law Brooke Ricketts examine the ceiling of the Old Senate Chamber following a mock swearing-in ceremony with Vice President Kamala Harris at the U.S. Capitol in Washington, U.S., January 23, 2023. REUTERS/Nathan Howard 

U.S. Senator Pete Ricketts (R-NE) looks into the Old Senate Chamber before a mock swearing-in ceremony with Vice President Kamala Harris at the U.S. Capitol in Washington, U.S., January 23, 2023. REUTERS/Nathan Howard 

U.S. Senator Pete Ricketts (R-NE), his daughter Eleanor Ricketts, his wife Susanne Shore and Vice President Kamala Harris pose for a photo during a mock swearing in ceremony at the U.S. Capitol in Washington, U.S., January 23, 2023. REUTERS/Nathan Howard 

U.S. Senator Pete Ricketts (R-NE), his daughter Eleanor Ricketts and his wife Susanne Shore listen as Vice President Kamala Harris talks about the history of the Old Senate Chamber during a mock swearing in ceremony at the U.S. Capitol in Washington, U.S., January 23, 2023. REUTERS/Nathan Howard 

Newly appointed German Defence Minister Boris Pistorius stands next to Former German Defence Minister Christine Lambrecht as he inspects a Bundeswehr armed forces guard of honour during an office handing over ceremony at the Defence Ministry in Berlin, Germany January 19, 2023. REUTERS/Fabrizio Bensch 

Newly appointed German Defence Minister Boris Pistorius inspects a Bundeswehr armed forces guard of honour during an office handing over ceremony at the Defence Ministry in Berlin, Germany January 19, 2023. REUTERS/Fabrizio Bensch 

Newly appointed German Defence Minister Boris Pistorius inspects a Bundeswehr armed forces guard of honour during an office handing over ceremony at the Defence Ministry in Berlin, Germany January 19, 2023. REUTERS/Fabrizio Bensch 

Newly appointed German Defence Minister Boris Pistorius walks next to Former German Defence Minister Christine Lambrecht as he inspects a Bundeswehr armed forces guard of honour during an office handing over ceremony at the Defence Ministry in Berlin, Germany January 19, 2023. REUTERS/Fabrizio Bensch 

Newly appointed German Defence Minister Boris Pistorius and former German Defence Minister Christine Lambrecht inspect a Bundeswehr armed forces guard of honour during an office handing over ceremony at the Defence Ministry in Berlin, Germany January 19, 2023. REUTERS/Michele Tantussi 

Newly appointed German Defence Minister Boris Pistorius stands next to Former German Defence Minister Christine Lambrecht as he inspects a Bundeswehr armed forces guard of honour during an office handing over ceremony at the Defence Ministry in Berlin, Germany January 19, 2023. REUTERS/Fabrizio Bensch 

Newly appointed German Defence Minister Boris Pistorius attends an office handing over ceremony at the Defence Ministry in Berlin, Germany January 19, 2023. REUTERS/Michele Tantussi 

Newly appointed German Defence Minister Boris Pistorius inspects a Bundeswehr armed forces guard of honour during an office handing over ceremony at the Defence Ministry in Berlin, Germany January 19, 2023. REUTERS/Michele Tantussi 

Newly appointed German Defence Minister Boris Pistorius inspects a Bundeswehr armed forces guard of honour during an office handing over ceremony at the Defence Ministry in Berlin, Germany January 19, 2023. REUTERS/Michele Tantussi 

Newly appointed German Defence Minister Boris Pistorius inspects a Bundeswehr armed forces guard of honour during an office handing over ceremony at the Defence Ministry in Berlin, Germany January 19, 2023. REUTERS/Fabrizio Bensch 

Newly appointed German Defence Minister Boris Pistorius and former German Defence Minister Christine Lambrecht inspect a Bundeswehr armed forces guard of honour during an office handing over ceremony at the Defence Ministry in Berlin, Germany January 19, 2023. REUTERS/Michele Tantussi 

Newly appointed German Defence Minister Boris Pistorius inspects a Bundeswehr armed forces guard of honour during an office handing over ceremony at the Defence Ministry in Berlin, Germany January 19, 2023. REUTERS/Fabrizio Bensch