The hands of Terumi Tanaka, a Nagasaki atomic bombing survivor and co-chairperson of Nihon Hidankyo, a country-wide organisation of atomic and hydrogen bomb sufferers, are pictured during his interview with Reuters at the Nihon Hidankyo office in Tokyo, Japan July 30, 2020. Picture taken July 30, 2020. REUTERS/Issei Kato

cerumi Tanaka, a Nagasaki atomic bombing survivor and co-Chairperson of Nihon Hidankyo, a Japan-wide organisation of atomic and hydrogen bomb sufferers, shows a Nagasaki city map with circles indicating the distance from the hypocenter during an interview with Reuters at the Nihon Hidankyo office in Tokyo, Japan July 30, 2020. Picture taken July 30, 2020. REUTERS/Issei Kato

Terumi Tanaka, a Nagasaki atomic bombing survivor and co-chairperson of Nihon Hidankyo, a country-wide organisation of atomic and hydrogen bomb sufferers, attends an interview with Reuters at the Nihon Hidankyo office in Tokyo, Japan July 30, 2020. Picture taken July 30, 2020. REUTERS/Issei Kato

Terumi Tanaka, a Nagasaki atomic bombing survivor and co-chairperson of Nihon Hidankyo, a country-wide organisation of atomic and hydrogen bomb sufferers, poses for a photograph during an interview with Reuters at the Nihon Hidankyo office in Tokyo, Japan July 30, 2020. Picture taken July 30, 2020. REUTERS/Issei Kato

A badge of Nihon Hidankyo, a country-wide organisation of atomic and hydrogen bomb sufferers, is seen on the jacket of Terumi Tanaka, a Nagasaki atomic bombing survivor and co-chairperson of Nihon Hidankyo, during his interview with Reuters at the Nihon Hidankyo office in Tokyo, Japan July 30, 2020. Picture taken July 30, 2020. REUTERS/Issei Kato

Terumi Tanaka, a Nagasaki atomic bombing survivor and co-chairperson of Nihon Hidankyo, a country-wide organisation of atomic and hydrogen bomb sufferers, reacts during an interview with Reuters at the Nihon Hidankyo office in Tokyo, Japan July 30, 2020. Picture taken July 30, 2020. REUTERS/Issei Kato

Terumi Tanaka, a Nagasaki atomic bombing survivor and co-chairperson of Nihon Hidankyo, a country-wide organisation of atomic and hydrogen bomb sufferers, attends an interview with Reuters at the Nihon Hidankyo office in Tokyo, Japan July 30, 2020. Picture taken July 30, 2020. REUTERS/Issei Kato

Terumi Tanaka, a Nagasaki atomic bombing survivor and co-chairperson of Nihon Hidankyo, a country-wide organisation of atomic and hydrogen bomb sufferers, poses for a photograph during an interview with Reuters at the Nihon Hidankyo office in Tokyo, Japan July 30, 2020. Picture taken July 30, 2020. REUTERS/Issei Kato

National Disaster Response Force (NDRF) and fire brigade personnel look for survivors trapped in the debris after part of a residential building collapsed following heavy rains in Mumbai, India, July 16, 2020. REUTERS/Francis Mascarenhas

National Disaster Response Force (NDRF) and fire brigade personnel look for survivors trapped in the debris after part of a residential building collapsed following heavy rains in Mumbai, India, July 16, 2020. REUTERS/Francis Mascarenhas

National Disaster Response Force (NDRF) personnel look for survivors trapped in the debris with a sniffer dog after part of a residential building collapsed after heavy rains in Mumbai, India, July 16, 2020. REUTERS/Francis Mascarenhas

National Disaster Response Force (NDRF) and fire brigade personnel look for survivors trapped in the debris after part of a residential building collapsed following heavy rains in Mumbai, India, July 16, 2020. REUTERS/Francis Mascarenhas TPX IMAGES OF THE DAY

National Disaster Response Force (NDRF) and fire brigade personnel look for survivors trapped in the debris after part of a residential building collapsed following heavy rains in Mumbai, India, July 16, 2020. REUTERS/Francis Mascarenhas

National Disaster Response Force (NDRF) and fire brigade personnel look for survivors trapped in the debris after part of a residential building collapsed following heavy rains in Mumbai, India, July 16, 2020. REUTERS/Francis Mascarenhas

National Disaster Response Force (NDRF) and fire brigade personnel look for survivors trapped in the debris after part of a residential building collapsed following heavy rains in Mumbai, India, July 16, 2020. REUTERS/Francis Mascarenhas

National Disaster Response Force (NDRF) personnel look for survivors trapped in the debris with a sniffer dog after part of a residential building collapsed after heavy rains in Mumbai, India, July 16, 2020. REUTERS/Francis Mascarenhas

People walk through a forest near the village of Snagovo, Bosnia and Herzegovina, July 8, 2020. Hundreds of people started on Wednesday a 85 km march from Nezuk to Srebrenica called the "March of Peace", to retrace the route in reverse taken by Bosnian Muslims who fled Serb forces as they slaughtered 8,000 of their Muslim kin in 1995. The participants in the march consist of survivors of the Srebrenica massacre as well as people from all parts of Bosnia and countries around the world. REUTERS/Dado Ruvic

People walk through a forest near the village of Snagovo, Bosnia and Herzegovina, July 8, 2020. Hundreds of people started on Wednesday a 85 km march from Nezuk to Srebrenica called the "March of Peace", to retrace the route in reverse taken by Bosnian Muslims who fled Serb forces as they slaughtered 8,000 of their Muslim kin in 1995. The participants in the march consist of survivors of the Srebrenica massacre as well as people from all parts of Bosnia and countries around the world. REUTERS/Dado Ruvic

People walk through a forest near the village of Snagovo, Bosnia and Herzegovina, July 8, 2020. Hundreds of people started on Wednesday a 85 km march from Nezuk to Srebrenica called the "March of Peace", to retrace the route in reverse taken by Bosnian Muslims who fled Serb forces as they slaughtered 8,000 of their Muslim kin in 1995. The participants in the march consist of survivors of the Srebrenica massacre as well as people from all parts of Bosnia and countries around the world. REUTERS/Dado Ruvic?

A man carries an old Bosnian flag near the village of Crni Vrh, Bosnia and Herzegovina, July 8, 2020. Hundreds of people started on Wednesday a 85 km march from Nezuk to Srebrenica called the "March of Peace", to retrace the route in reverse taken by Bosnian Muslims who fled Serb forces as they slaughtered 8,000 of their Muslim kin in 1995. The participants in the march consist of survivors of the Srebrenica massacre as well as people from all parts of Bosnia and countries around the world. REUTERS/Dado Ruvic

People walk through a forest near the village of Crni Vrh, Bosnia and Herzegovina, July 8, 2020. Hundreds of people started on Wednesday a 85 km march from Nezuk to Srebrenica called the "March of Peace", to retrace the route in reverse taken by Bosnian Muslims who fled Serb forces as they slaughtered 8,000 of their Muslim kin in 1995. The participants in the march consist of survivors of the Srebrenica massacre as well as people from all parts of Bosnia and countries around the world. REUTERS/Dado Ruvic

People walk through a forest near the village of Crni Vrh, Bosnia and Herzegovina, July 8, 2020. Hundreds of people started on Wednesday a 85 km march from Nezuk to Srebrenica called the "March of Peace", to retrace the route in reverse taken by Bosnian Muslims who fled Serb forces as they slaughtered 8,000 of their Muslim kin in 1995. The participants in the march consist of survivors of the Srebrenica massacre as well as people from all parts of Bosnia and countries around the world. REUTERS/Dado Ruvic

People walk through a forest near the village of Crni Vrh, Bosnia and Herzegovina, July 8, 2020. Hundreds of people started on Wednesday a 85 km march from Nezuk to Srebrenica called the "March of Peace", to retrace the route in reverse taken by Bosnian Muslims who fled Serb forces as they slaughtered 8,000 of their Muslim kin in 1995. The participants in the march consist of survivors of the Srebrenica massacre as well as people from all parts of Bosnia and countries around the world. REUTERS/Dado Ruvic

Srebrenica genocide survivor Ramiz Nukic collects clothes of killed people that he found in the forest near Konjevic Polje, Bosnia and Herzegovina July 6, 2020. Nukic has made himself a promise, he will search for the remains of the people who went missing until the last of them is found. Twenty-five years ago, the Bosnian Serb forces commanded by General Ratko Mladic attacked the eastern enclave of Srebrenica, where about 40,000 Bosnian Muslims had found shelter under the United Nations protection. Picture taken July 6, 2020. REUTERS/Dado Ruvic

Srebrenica genocide survivor Ramiz Nukic searches for bones in the forest near Konjevic Polje, Bosnia and Herzegovina July 6, 2020. Nukic has made himself a promise, he will search for the remains of the people who went missing until the last of them is found. Twenty-five years ago, the Bosnian Serb forces commanded by General Ratko Mladic attacked the eastern enclave of Srebrenica, where about 40,000 Bosnian Muslims had found shelter under the United Nations protection. Picture taken July 6, 2020. REUTERS/Dado Ruvic

Srebrenica genocide survivor Ramiz Nukic looks at a skull that he found in the forest near Konjevic Polje, Bosnia and Herzegovina July 6, 2020. Nukic has made himself a promise, he will search for the remains of the people who went missing until the last of them is found. Twenty-five years ago, the Bosnian Serb forces commanded by General Ratko Mladic attacked the eastern enclave of Srebrenica, where about 40,000 Bosnian Muslims had found shelter under the United Nations protection. Picture taken July 6, 2020. REUTERS/Dado Ruvic

Srebrenica genocide survivor Ramiz Nukic looks at a skull that he found in the forest near Konjevic Polje, Bosnia and Herzegovina July 6, 2020. Nukic has made himself a promise, he will search for the remains of the people who went missing until the last of them is found. Twenty-five years ago, the Bosnian Serb forces commanded by General Ratko Mladic attacked the eastern enclave of Srebrenica, where about 40,000 Bosnian Muslims had found shelter under the United Nations protection. Picture taken July 6, 2020. REUTERS/Dado Ruvic

Srebrenica genocide survivor Ramiz Nukic searches for bones in the forest near Konjevic Polje, Bosnia and Herzegovina July 6, 2020. Nukic has made himself a promise, he will search for the remains of the people who went missing until the last of them is found. Twenty-five years ago, the Bosnian Serb forces commanded by General Ratko Mladic attacked the eastern enclave of Srebrenica, where about 40,000 Bosnian Muslims had found shelter under the United Nations protection. Picture taken July 6, 2020. REUTERS/Dado Ruvic

Srebrenica genocide survivor Ramiz Nukic prays near the graves of his father and two brothers in Srebrenica-Potocari Memorial Center, near Srebrenica, Bosnia and Herzegovina July 6, 2020. Nukic has made himself a promise, he will search for the remains of the people who went missing until the last of them is found. Twenty-five years ago, the Bosnian Serb forces commanded by General Ratko Mladic attacked the eastern enclave of Srebrenica, where about 40,000 Bosnian Muslims had found shelter under the United Nations protection. Picture taken July 6, 2020. REUTERS/Dado Ruvic

Srebrenica genocide survivor Ramiz Nukic looks at a skull that he found in the forest near Konjevic Polje, Bosnia and Herzegovina July 6, 2020. Nukic has made himself a promise, he will search for the remains of the people who went missing until the last of them is found. Twenty-five years ago, the Bosnian Serb forces commanded by General Ratko Mladic attacked the eastern enclave of Srebrenica, where about 40,000 Bosnian Muslims had found shelter under the United Nations protection. Picture taken July 6, 2020. REUTERS/Dado Ruvic

Srebrenica genocide survivor Ramiz Nukic looks a spoon and a medicine vial belonging to killed people in the forest near Konjevic Polje, Bosnia and Herzegovina July 6, 2020. Nukic has made himself a promise, he will search for the remains of the people who went missing until the last of them is found. Twenty-five years ago, the Bosnian Serb forces commanded by General Ratko Mladic attacked the eastern enclave of Srebrenica, where about 40,000 Bosnian Muslims had found shelter under the United Nations protection. Picture taken July 6, 2020. REUTERS/Dado Ruvic

Srebrenica genocide survivor Ramiz Nukic prays near the graves of his father and two brothers in Srebrenica-Potocari Memorial Center, near Srebrenica, Bosnia and Herzegovina July 6, 2020. Nukic has made himself a promise, he will search for the remains of the people who went missing until the last of them is found. Twenty-five years ago, the Bosnian Serb forces commanded by General Ratko Mladic attacked the eastern enclave of Srebrenica, where about 40,000 Bosnian Muslims had found shelter under the United Nations protection. Picture taken July 6, 2020. REUTERS/Dado Ruvic

An image of survivors of the 1989 Tiananmen Square protests posing for a photograph with Secretary of State Mike Pompeo is displayed as Pompeo, accompanied by Sam Brownback, Ambassador at Large for International Religious Freedom, speaks at a news conference at the State Department in Washington, DC, U.S., June 10, 2020. Andrew Harnik/Pool via REUTERS

Petr Brandejsky, a 90-year-old Holocaust survivor, stands at his apartment as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, April 24, 2020. Picture taken April 24, 2020. REUTERS/David W Cerny

Petr Brandejsky, a 90-year-old Holocaust survivor, is helped by a volunteer to prepare a lunch at his apartment as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, April 24, 2020. Picture taken April 24, 2020. REUTERS/David W Cerny

Petr Brandejsky, a 90-year-old Holocaust survivor, points at a picture at his apartment as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, April 24, 2020. Picture taken April 24, 2020. REUTERS/David W Cerny

Petr Brandejsky, a 90-year-old Holocaust survivor, prepares a lunch at his apartment as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, April 24, 2020. Picture taken April 24, 2020. REUTERS/David W Cerny

Petr Brandejsky, a 90-year-old Holocaust survivor, holds a book at his apartment as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, April 24, 2020. Picture taken April 24, 2020. REUTERS/David W Cerny

Petr Brandejsky, a 90-year-old Holocaust survivor, is seen at his apartment as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, April 24, 2020. Picture taken April 24, 2020. REUTERS/David W Cerny

Petr Brandejsky, a 90-year-old Holocaust survivor, reads a book at his apartment as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, April 24, 2020. Picture taken April 24, 2020. REUTERS/David W Cerny

Petr Brandejsky, a 90-year-old Holocaust survivor, stands at his apartment as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, April 24, 2020. Picture taken April 24, 2020. REUTERS/David W Cerny

Petr Brandejsky, a 90-year-old Holocaust survivor, looks out of a window of his apartment as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, April 24, 2020. Picture taken April 24, 2020. REUTERS/David W Cerny

Petr Brandejsky, a 90-year-old Holocaust survivor, reads a book at his apartment as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, April 24, 2020. Picture taken April 24, 2020. REUTERS/David W Cerny

Petr Brandejsky, a 90-year-old Holocaust survivor, wears a face mask at his apartment as the spread of the coronavirus disease (COVID-19) continues in Prague, Czech Republic, April 24, 2020. Picture taken April 24, 2020. REUTERS/David W Cerny

A view shows the Clinique de l'Estree private hospital in Stains near Paris as the spread of the coronavirus disease continues in France, April 23, 2020. REUTERS/Benoit Tessier

An ambulance for patient Mang Phother, 61, who spent 16 days in the Intensive Care Unit (ICU) for the coronavirus disease (COVID-19), is seen in front the Clinique de l'Estree private hospital in Stains near Paris as the spread of the coronavirus disease continues in France, April 23, 2020. REUTERS/Benoit Tessier

Medical staff members applaud patient Mang Phother, 61, who spent 16 days in the Intensive Care Unit (ICU) for the coronavirus disease (COVID-19), as he leaves the Clinique de l'Estree private hospital in Stains near Paris as the spread of the coronavirus disease continues in France, April 23, 2020. REUTERS/Benoit Tessier

Medical staff member applauds patient Mang Phother, 61, who spent 16 days in the Intensive Care Unit (ICU) for the coronavirus disease (COVID-19), as he leaves the Clinique de l'Estree private hospital in Stains near Paris as the spread of the coronavirus disease continues in France, April 23, 2020. REUTERS/Benoit Tessier

Medical staff members congratulate patient Mang Phother, 61, who spent 16 days in the Intensive Care Unit (ICU) for the coronavirus disease (COVID-19), as he leaves the Clinique de l'Estree private hospital in Stains near Paris as the spread of the coronavirus disease continues in France, April 23, 2020. REUTERS/Benoit Tessier

Patient Mang Phother, 61, who spent 16 days in the Intensive Care Unit (ICU) for the coronavirus disease (COVID-19) at the Clinique de l'Estree private hospital, arrives at his home in Stains near Paris as the spread of the coronavirus disease continues in France, April 23, 2020. REUTERS/Benoit Tessier

Patient Mang Phother, 61, who spent 16 days in the Intensive Care Unit (ICU) for the coronavirus disease (COVID-19) at the Clinique de l'Estree private hospital, sits in a wheelchair as he arrives at his home in Stains near Paris as the spread of the coronavirus disease continues in France, April 23, 2020. REUTERS/Benoit Tessier

Patient Mang Phother, 61, who spent 16 days in the Intensive Care Unit (ICU) for the coronavirus disease (COVID-19) at the Clinique de l'Estree private hospital, arrives at his home in Stains near Paris as the spread of the coronavirus disease continues in France, April 23, 2020. REUTERS/Benoit Tessier

Patient Mang Phother, 61, who spent 16 days in the Intensive Care Unit (ICU) for the coronavirus disease (COVID-19) at the Clinique de l'Estree private hospital, arrives at his home in Stains near Paris as the spread of the coronavirus disease continues in France, April 23, 2020. REUTERS/Benoit Tessier

Patient Mang Phother, 61, who spent 16 days in the Intensive Care Unit (ICU) for the coronavirus disease (COVID-19) at the Clinique de l'Estree private hospital, sits next to his wife at his home in Stains near Paris as the spread of the coronavirus disease continues in France, April 23, 2020. REUTERS/Benoit Tessier

Patient Mang Phother, 61, who spent 16 days in the Intensive Care Unit (ICU) for the coronavirus disease (COVID-19) at the Clinique de l'Estree private hospital, arrives at his home in Stains near Paris as the spread of the coronavirus disease continues in France, April 23, 2020. REUTERS/Benoit Tessier

Patient Mang Phother, 61, who spent 16 days in the Intensive Care Unit (ICU) for the coronavirus disease (COVID-19) at the Clinique de l'Estree private hospital, sits in a wheelchair as he leaves an ambulance to arrive at his home in Stains near Paris as the spread of the coronavirus disease continues in France, April 23, 2020. REUTERS/Benoit Tessier

Patient Mang Phother, 61, who spent 16 days in the Intensive Care Unit (ICU) for the coronavirus disease (COVID-19) at the Clinique de l'Estree private hospital, sits in a wheelchair as he leaves an ambulance to arrive at his home in Stains near Paris as the spread of the coronavirus disease continues in France, April 23, 2020. REUTERS/Benoit Tessier

Patient Mang Phother, 61, who spent 16 days in the Intensive Care Unit (ICU) for the coronavirus disease (COVID-19), poses before leaving the Clinique de l'Estree private hospital in Stains near Paris as the spread of the coronavirus disease continues in France, April 23, 2020. REUTERS/Benoit Tessier

Patient Mang Phother, 61, who spent 16 days in the Intensive Care Unit (ICU) for the coronavirus disease (COVID-19), talks with medical staff member before leaving the Clinique de l'Estree private hospital in Stains near Paris as the spread of the coronavirus disease continues in France, April 23, 2020. REUTERS/Benoit Tessier

Patient Mang Phother, 61, who spent 16 days in the Intensive Care Unit (ICU) for the coronavirus disease (COVID-19), talks with doctor Anne-Marie Gouvet, 70, and member of medical staff before leaving the Clinique de l'Estree private hospital in Stains near Paris as the spread of the coronavirus disease continues in France, April 23, 2020. REUTERS/Benoit Tessier