A police officer stands guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

A police officer stands guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

Police officers stand guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

A police officer stands guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

A police officer stands guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

A woman walks past a police officer standing guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

A police officer stands guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

Police officers stand guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

A police officer stands guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

Police officers stand guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

Police officers stand guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

Police officers stand guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

Police officers stand guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

Police officers stand guard as a psychologist walks outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

Police officers stand guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

Police officers stand guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

Police officers stand guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

Police officers stand guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

A police officer stands guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

Police officers keep guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

Police officers stand guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

Police officers stand guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

Police officers stand guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

Police officers stand guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

Police officers stand guard outside Ismaili Centre, after a deadly knife attack in Lisbon, Portugal, March 28, 2023. REUTERS/Pedro Nunes 

A New York police car stands guard in front of Trump Tower as the Manhattan District Attorney Alvin Bragg's office is investigating $130,000 paid in the final weeks of former U.S. President Donald Trump's 2016 election campaign to Stormy Daniels, a porn star who said she had a sexual encounter with Trump in 2006, when he was married to his current wife Melania, in New York City, U.S., March 27, 2023. REUTERS/Eduardo Munoz 

New York police cars stand guard in front of Trump Tower as the Manhattan District Attorney Alvin Bragg's office is investigating $130,000 paid in the final weeks of former U.S. President Donald Trump's 2016 election campaign to Stormy Daniels, a porn star who said she had a sexual encounter with Trump in 2006 when he was married to his current wife Melania, in New York City, U.S., March 27, 2023. REUTERS/Eduardo Munoz 

A New York police car stands guard in front of Trump Tower as the Manhattan District Attorney Alvin Bragg's office is investigating $130,000 paid in the final weeks of former U.S. President Donald Trump's 2016 election campaign to Stormy Daniels, a porn star who said she had a sexual encounter with Trump in 2006 when he was married to his current wife Melania, in New York City, U.S., March 27, 2023. REUTERS/Eduardo Munoz 

A New York police car stands guard in front of Trump Tower as the Manhattan District Attorney Alvin Bragg's office is investigating $130,000 paid in the final weeks of former U.S. President Donald Trump's 2016 election campaign to Stormy Daniels, a porn star who said she had a sexual encounter with Trump in 2006 when he was married to his current wife Melania, in New York City, U.S., March 27, 2023. REUTERS/Eduardo Munoz 

Israeli police officers stand guard, as people attend a demonstration after Israeli Prime Minister Benjamin Netanyahu dismissed the defense minister and his nationalist coalition government presses on with its judicial overhaul, in Jerusalem, March 27, 2023. REUTERS/Ammar Awad 

Chinese Coast Guard ships have been patrolling gas and oil fields owned or operated by Russian firms in South China Sea 

Chinese Coast Guard ships have been patrolling gas and oil fields owned or operated by Russian firms in South China Sea 

Austrian police officers guard a protest against an international gas conference in Vienna, Austria, March 27, 2023. REUTERS/Leonhard Foeger 

Austrian police officers guard a protest against an international gas conference in Vienna, Austria, March 27, 2023. REUTERS/Leonhard Foeger 

Austrian police officers guard a protest against an international gas conference in Vienna, Austria, March 27, 2023. REUTERS/Leonhard Foeger 

Austrian police officers guard a protest against an international gas conference in Vienna, Austria, March 27, 2023. REUTERS/Leonhard Foeger 

Austrian police officers guard a protest against an international gas conference in Vienna, Austria, March 27, 2023. REUTERS/Leonhard Foeger 

A guard closes the gate of a storage facility for buses during a nationwide strike called by the German trade union Verdi over a wage dispute, in Bonn, Germany, March 27, 2023. REUTERS/Wolfgang Rattay 

Members of security forces stand guard as people attend a demonstration after Israeli Prime Minister Benjamin Netanyahu dismissed the defense minister and his nationalist coalition government presses on with its judicial overhaul, in Tel Aviv, Israel, March 27, 2023. REUTERS/Nir Elias 

Members of security forces stand guard as people attend a demonstration after Israeli Prime Minister Benjamin Netanyahu dismissed the defense minister and his nationalist coalition government presses on with its judicial overhaul, in Tel Aviv, Israel, March 27, 2023. REUTERS/Nir Elias 

U.S. President Joe Biden and first lady Jill Biden board Marine One to return to the White House from Delaware Air National Guard Base in New Castle, Delaware, U.S. March 26, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden boards Marine One to return to the White House from Delaware Air National Guard Base in New Castle, Delaware, U.S. March 26, 2023. REUTERS/Ken Cedeno 

People sit in a bar as riot police stand guard during a demonstration against the French government's pension reform, in Paris, France March 25, 2023. REUTERS/Nacho Doce 

Evacuated people listen to instructions by a Spanish Civil Guard following a wildfire raged in Los Calpe, eastern Spain, Spain, March 25, 2023. REUTERS/Lorena Sopena 

Greek Presidential Guards march during a military parade marking Greece's Independence Day, in Athens, Greece March 25, 2023. REUTERS/Louiza Vradi 

Pope Francis walks past a Swiss Guard member ahead of meeting with the faithful of parishes from Rho at the Vatican, March 25, 2023. REUTERS/Yara Nardi 

Pope Francis walks past a Swiss Guard member ahead of meeting with the faithful of parishes from Rho at the Vatican, March 25, 2023. REUTERS/Yara Nardi 

U.S. President Joe Biden and first lady Jill Biden exit off of Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 24, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden and first lady Jill Biden exit off of Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 24, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden and first lady Jill Biden exit off of Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 24, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden and first lady Jill Biden exit off of Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 24, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden and first lady Jill Biden exit off of Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 24, 2023. REUTERS/Ken Cedeno 

U.S. President Joe Biden and first lady Jill Biden exit off of Air Force One at Delaware Air National Guard Base in New Castle, Delaware, U.S. March 24, 2023. REUTERS/Ken Cedeno 

A police officer stands guard as Muslims attend Friday prayers during the fasting month of Ramadan, in Peshawar, Pakistan March 24, 2023. REUTERS/Fayaz Aziz 

A woman gestures, as police members stand guard near a branch of Fransabank, during a protest organized by Depositors' Outcry, a group campaigning for the rights of depositors in Lebanon, in Beirut, Lebanon March 24, 2023. REUTERS/Mohamed Azakir 

Israeli security personnel stands guard as Palestinians make their way through an Israeli checkpoint to attend the first Friday prayers of Ramadan in Jerusalem's Al-Aqsa mosque, in Bethlehem in the Israeli-occupied West Bank March 24, 2023. REUTERS/Mussa Qawasma 

Members of the Israeli security forces stand guard as Palestinians make their way to attend the first Friday prayers of Ramadan in Jerusalem's Al-Aqsa mosque, at Qalandia checkpoint in the Israeli-occupied West Bank March 24, 2023. REUTERS/Mohamad Torokman 

French riot police officers stand guard at the TotalEnergies refinery as energy workers on strike gather in front of the refinery to protest against the French government's pensions reform, in Gonfreville-L’Orcher near Le Havre, France, March 24, 2023. REUTERS/Pascal Rossignol 

French riot police officers stand guard at the TotalEnergies refinery as energy workers on strike gather in front of the refinery to protest against the French government's pensions reform, in Gonfreville-L’Orcher near Le Havre, France, March 24, 2023. REUTERS/Pascal Rossignol 

Members of the Israeli security forces stand guard as Palestinians make their way to attend the first Friday prayers of Ramadan in Jerusalem's Al-Aqsa mosque, at Qalandia checkpoint in the Israeli-occupied West Bank March 24, 2023. REUTERS/Mohamad Torokman