Dutch King Willem-Alexander and U.S. ambassador Peter Hoekstra attend a ceremony commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Marcel Van Hoorn/Pool via REUTERS

U.S. ambassador Peter Hoekstra attends a ceremony commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Marcel Van Hoorn/Pool via REUTERS

Dutch King Willem-Alexander and U.S. ambassador Peter Hoekstra attend a ceremony commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Marcel Van Hoorn/Pool via REUTERS

Dutch King Willem-Alexander and U.S. ambassador Peter Hoekstra attend a ceremony commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Marcel Van Hoorn/Pool via REUTERS

Dutch King Willem-Alexander and U.S. ambassador Peter Hoekstra attend a ceremony commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Marcel Van Hoorn/Pool via REUTERS

Dutch King Willem-Alexander and U.S. ambassador Peter Hoekstra attend a ceremony commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Marcel Van Hoorn/Pool via REUTERS

Dutch King Willem-Alexander and U.S. ambassador Peter Hoekstra attend a ceremony commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Marcel Van Hoorn/Pool via REUTERS

Dutch King Willem-Alexander and U.S. ambassador Peter Hoekstra attend a ceremony commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Marcel Van Hoorn/Pool via REUTERS

Dutch King Willem-Alexander and U.S. ambassador Peter Hoekstra attend a ceremony commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Marcel Van Hoorn/Pool via REUTERS

Dutch King Willem-Alexander and U.S. ambassador Peter Hoekstra attend a ceremony commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Marcel Van Hoorn/Pool via REUTERS

Dutch King Willem-Alexander and U.S. ambassador Peter Hoekstra attend a ceremony commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Marcel Van Hoorn/Pool via REUTERS

Dutch King Willem-Alexander and U.S. ambassador Peter Hoekstra attend a ceremony commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Marcel Van Hoorn/Pool via REUTERS

Dutch King Willem-Alexander and U.S. ambassador Peter Hoekstra attend a ceremony commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Marcel Van Hoorn/Pool via REUTERS

Dutch King Willem-Alexander, second left, and U.S. ambassador Peter Hoekstra, left, talk to a family who adopted a grave after a wreath laying ceremony commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Coronavirus restrictions forced the closure of the cemetery in Margraten and the ceremony was held without the general public. Peter Dejong/Pool via REUTERS

Dutch King Willem-Alexander, center, and U.S. ambassador Peter Hoekstra, to his left, look up at F-16 fighter jets of the Royal Netherlands Air Force who perform a flyover during a ceremony commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Coronavirus restrictions forced the closure of the cemetery in Margraten and the ceremony was held without the general public. Peter Dejong/Pool via REUTERS

Dutch King Willem-Alexander, right, leads before U.S. ambassador Peter Hoekstra, and other dignitaries as they leave after a wreath laying ceremony commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Coronavirus restrictions forced the closure of the cemetery in Margraten and the ceremony was held without the general public. Peter Dejong/Pool via REUTERS

Dutch King Willem-Alexander, center, and U.S. ambassador Peter Hoekstra, to his left, are seen as F-16 fighter jets of the Royal Netherlands Air Force perform a flyover during a ceremony commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Coronavirus restrictions forced the closure of the cemetery in Margraten and the ceremony was held without the general public. Peter Dejong/Pool via REUTERS

Dutch King Willem-Alexander, center, and U.S. ambassador Peter Hoekstra, to his left, are seen as F-16 fighter jets of the Royal Netherlands Air Force perform a flyover during a ceremony commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Coronavirus restrictions forced the closure of the cemetery in Margraten and the ceremony was held without the general public. Peter Dejong/Pool via REUTERS

Dutch King Willem-Alexander, center, and U.S. ambassador Peter Hoekstra, to his left, observe a moment of silence with other dignitaries, commemorating over 10,000 U.S. Second World War military dead buried or remembered at the Netherlands American Cemetery and Memorial in Margraten, Netherlands May 24, 2020. Coronavirus restrictions forced the closure of the cemetery in Margraten and the ceremony was held without the general public. Peter Dejong/Pool via REUTERS

U.S. ambassador to Russia John Sullivan (R) and Brock Bierman, Assistant Administrator of the U.S. Agency for International Development (USAID), stand next to a U.S. Air Force C-17 Globemaster transport plane which delivered the first batch of medical aid from the United States, including 50 ventilators, at Vnukovo International Airport amid the coronavirus disease (COVID-19) outbreak in Moscow, Russia May 21, 2020. REUTERS/Evgenia Novozhenina/Pool

U.S. ambassador to Russia John Sullivan (R) and Brock Bierman, Assistant Administrator of the U.S. Agency for International Development (USAID), stand next to a U.S. Air Force C-17 Globemaster transport plane which delivered the first batch of medical aid from the United States, including 50 ventilators, at Vnukovo International Airport amid the coronavirus disease (COVID-19) outbreak in Moscow, Russia May 21, 2020. REUTERS/Evgenia Novozhenina/Pool

U.S. ambassador to Russia John Sullivan wearing a protective face mask stands next to a U.S. Air Force C-17 Globemaster transport plane which delivered the first batch of medical aid from the United States, including 50 ventilators, at Vnukovo International Airport amid the coronavirus disease (COVID-19) outbreak in Moscow, Russia May 21, 2020. REUTERS/Evgenia Novozhenina/Pool

U.S. ambassador to Russia John Sullivan (R) and Brock Bierman, Assistant Administrator of the U.S. Agency for International Development (USAID), stand next to a U.S. Air Force C-17 Globemaster transport plane which delivered the first batch of medical aid from the United States, including 50 ventilators, at Vnukovo International Airport amid the coronavirus disease (COVID-19) outbreak in Moscow, Russia May 21, 2020. REUTERS/Evgenia Novozhenina/Pool

U.S. ambassador to Russia John Sullivan (R) talks to Brock Bierman, Assistant Administrator of the U.S. Agency for International Development (USAID), next to a U.S. Air Force C-17 Globemaster transport plane which delivered the first batch of medical aid from the United States, including 50 ventilators, at Vnukovo International Airport amid the coronavirus disease (COVID-19) outbreak in Moscow, Russia May 21, 2020. REUTERS/Evgenia Novozhenina/Pool

U.S. ambassador to Russia John Sullivan (R) talks to Brock Bierman, Assistant Administrator of the U.S. Agency for International Development (USAID), next to a U.S. Air Force C-17 Globemaster transport plane which delivered the first batch of medical aid from the United States, including 50 ventilators, at Vnukovo International Airport amid the coronavirus disease (COVID-19) outbreak in Moscow, Russia May 21, 2020. REUTERS/Evgenia Novozhenina/Pool

The flag-draped coffin of Chinese ambassador Du Wei, who died at his home, is pictured during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

The flag-draped coffin of Chinese ambassador Du Wei, who died at his home, is pictured during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

The flag-draped coffin of Chinese ambassador Du Wei, who died at his home, is pictured during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

The flag-draped coffin of Chinese ambassador Du Wei, who died at his home, is pictured during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

The flag-draped coffin of Chinese ambassador Du Wei, who died at his home, is pictured during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

The flag-draped coffin of Chinese ambassador Du Wei, who died at his home, is pictured during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

The flag-draped coffin of Chinese ambassador Du Wei, who died at his home, is pictured during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

Chinese officials pay their respect in front of the flag-draped coffin of Chinese ambassador Du Wei, who died at his home, during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

Chinese officials pay their respect in front of the flag-draped coffin of Chinese ambassador Du Wei, who died at his home, during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

Chinese officials pay their respect in front of the flag-draped coffin of Chinese ambassador Du Wei, who died at his home, during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

Israeli soldiers stand beside the flag-draped coffin of Chinese ambassador Du Wei, who died at his home in the coastal city of Herzlyia, during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

Israeli soldiers stand beside the flag-draped coffin of Chinese ambassador Du Wei, who died at his home in the coastal city of Herzlyia, during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

Israeli soldiers wearing protective face masks stand around the coffin of Chinese ambassador Du Wei, who died at his home in the coastal city of Herzlyia, during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

Israeli soldiers wearing protective face masks stand around the coffin of Chinese ambassador Du Wei, who died at his home in the coastal city of Herzlyia, during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

Israeli soldiers wearing protective face masks carry the coffin of Chinese ambassador Du Wei, who died at his home in the coastal city of Herzlyia, during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

Israeli soldiers wearing protective face masks stand next to the coffin of Chinese ambassador Du Wei, who died at his home in the coastal city of Herzlyia, during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

Israeli soldiers wearing protective face masks carry the coffin of Chinese ambassador Du Wei, who died at his home in the coastal city of Herzlyia, during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

Israeli soldiers wearing protective face masks carry the coffin of Chinese ambassador Du Wei, who died at his home in the coastal city of Herzlyia, during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

Israeli soldiers wearing protective face masks stand around the coffin of Chinese ambassador Du Wei, who died at his home in the coastal city of Herzlyia, during a ceremony at Ben-Gurion International Airport, near Tel Aviv, Israel May 20, 2020. Jack Guez/Pool via REUTERS

Members of Zaka Rescue and Recovery team enter the residence of China's ambassador to Israel, Du Wei, in Herzliya, near Tel Aviv, Israel May 17, 2020. REUTERS/Nir Elias

An Israeli policeman stands nearby as an ambulance leaves the residence of China's ambassador to Israel, Du Wei, in Herzliya, near Tel Aviv, Israel May 17, 2020. REUTERS/Nir Elias

An Israeli police forensic expert holds a camera as she prepares to enter China's ambassador to Israel, Du Wei's house in Herzliya, near Tel Aviv, Israel May 17, 2020. REUTERS/Nir Elias

Doctor Chen Kugel, head of Israel National Center of Forensic Medicine and his colleague, pass through a police cordon as they enter China's ambassador to Israel, Du Wei's house in Herzliya, near Tel Aviv, Israel May 17, 2020. REUTERS/Nir Elias

An Israeli policeman and a man stand near the entrance of China's ambassador to Israel, Du Wei's house, in Herzliya, near Tel Aviv, Israel May 17, 2020. REUTERS/Nir Elias

Israeli police and forensic experts enter the house of China's ambassador to Israel, Du Wei, in Herzliya, near Tel Aviv, Israel May 17, 2020. REUTERS/Nir Elias

Israeli police forensic experts carry equipment into the house of China's ambassador to Israel, Du Wei, in Herzliya, near Tel Aviv, Israel May 17, 2020. REUTERS/Nir Elias

Israeli police work near the house of China's ambassador to Israel, Du Wei, in Herzliya, near Tel Aviv, Israel May 17, 2020. REUTERS/Nir Elias

An Israeli policeman cordons off an area near the house of China's ambassador to Israel, Du Wei, in Herzliya, near Tel Aviv, Israel May 17, 2020. REUTERS/Nir Elias

Israeli police and forensic experts are seen at the door of China's ambassador to Israel, Du Wei's home in Herzliya, near Tel Aviv, Israel May 17, 2020. REUTERS/Nir Elias

Israeli police are seen at the door of China's ambassador to Israel, Du Wei's home in Herzliya, near Tel Aviv, Israel May 17, 2020. REUTERS/Nir Elias

People and Israeli police are seen at the door of China's ambassador to Israel, Du Wei's home in Herzliya, near Tel Aviv, Israel May 17, 2020. REUTERS/Nir Elias

A four-legged robot dog called SPOT patrols a park as it undergoes testing to be deployed as a safe distancing ambassador, following the coronavirus disease (COVID-19) outbreak, in Singapore May 8, 2020. Picture taken May 8, 2020. REUTERS/Edgar Su

A four-legged robot dog called SPOT patrols a park as it undergoes testing to be deployed as a safe distancing ambassador, following the coronavirus disease (COVID-19) outbreak, in Singapore May 8, 2020. Picture taken May 8, 2020. REUTERS/Edgar Su

British ambassador to Greece Kate Smith greet refugees and migrants from overcrowded migrant camps who will be transferred to Britain where they will reunite with their families at the Athens International Airport, Greece, May 11, 2020. REUTERS/Alkis Konstantinidis

Deputy Migration Minister Giorgos Koumoutsakos and British ambassador to Greece Kate Smith talks before refugees and migrants from overcrowded migrant camps will be transferred to Britain where they will reunite with their families at the Athens International Airport, Greece, May 11, 2020. REUTERS/Alkis Konstantinidis