Musicians perform in front of the old memorial commemorating the 1980 Oktoberfest bombing, during a memorial service at Theresienwiese in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

Dieter Reiter, Mayor of the City of Munich, speaks at a memorial service commemorating the 1980 Oktoberfest bombing at Theresienwiese in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

General view of the new memorial commemorating the 1980 Oktoberfest bombing prior to a memorial service at Theresienwiese in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

General view of the new memorial commemorating the 1980 Oktoberfest bombing prior to a memorial service at Theresienwiese in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

General view of the new memorial commemorating the 1980 Oktoberfest bombing prior to a memorial service at Theresienwiese in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

General view of the new memorial commemorating the 1980 Oktoberfest bombing prior to a memorial service at Theresienwiese in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

People attend a memorial service commemorating the 1980 Oktoberfest bombing at Theresienwiese in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

German President Frank-Walter Steinmeier walks past an old memorial commemorating the 1980 Oktoberfest bombing during a wreath ceremony at a memorial service at Theresienwiese in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

Dimitrios Lagkadinos, Renata Martinez, Robert Hoeckmayr and Gudrun Lang, survivors of the 1980 Oktoberfest bombing, attend a memorial service commemorating the attack at Theresienwiese in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

Markus Soeder, Prime Minister of Bavaria, reacts as he speaks at a memorial service commemorating the 1980 Oktoberfest bombing at Theresienwiese in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

Markus Soeder, Prime Minister of Bavaria, adjusts his protective mask at a memorial service commemorating the 1980 Oktoberfest bombing at Theresienwiese in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

Renate Martinez, survivor of the 1980 Oktoberfest bombing, walks past the new memorial at Theresienwiese commemorating the attack, after a memorial service in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

Dimitrios Lagkadinos and Renate Martinez, survivors of the 1980 Oktoberfest bombing, German President Frank-Walter Steinmeier and his wife Elke Buedenbender and Markus Soeder, Prime Minister of Bavaria, pose for pictures in front of the new memorial at Theresienwiese after a memorial service in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

German President Frank-Walter Steinmeier walks through the new memorial commemorating the 1980 Oktoberfest bombing at Theresienwiese, after a memorial service in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

German President Frank-Walter Steinmeier walks through the new memorial commemorating the 1980 Oktoberfest bombing at Theresienwiese, after a memorial service in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

German President Frank-Walter Steinmeier speaks at a memorial service commemorating the 1980 Oktoberfest bombing at Theresienwiese in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

Renate Martinez, survivor of the 1980 Oktoberfest bombing, stands in front of the new memorial at Theresienwiese commemorating the attack, after a memorial service in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

Dimitrios Lagkadinos and Renate Martinez, survivors of the 1980 Oktoberfest bombing, German President Frank-Walter Steinmeier and his wife Elke Buedenbender and Markus Soeder, Prime Minister of Bavaria, pose for pictures in front of the new memorial at Theresienwiese after a memorial service in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

Renate Martinez, survivor of the 1980 Oktoberfest bombing, walks past the new memorial at Theresienwiese commemorating the attack, after a memorial service in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

Dimitrios Lagkadinos, survivor of the 1980 Oktoberfest bombing, poses for a photo in front of the new memorial at Theresienwiese commemorating the attack, after a memorial service in Munich, Germany, September 26, 2020. REUTERS/Andreas Gebert

French police secure the area near the Eiffel Tower after the French tourism landmark was evacuated following a bomb alert in Paris, France, September 23, 2020. REUTERS/Charles Platiau

French police secure the area near the Eiffel Tower after the French tourism landmark was evacuated following a bomb alert in Paris, France, September 23, 2020. REUTERS/Charles Platiau

French police secure the area near the Eiffel Tower after the French tourism landmark was evacuated following a bomb alert in Paris, France, September 23, 2020. REUTERS/Charles Platiau

French police secure the area near the Eiffel Tower after the French tourism landmark was evacuated following a bomb alert in Paris, France, September 23, 2020. REUTERS/Charles Platiau

Journalists work as French police secure the area near the Eiffel Tower after the French tourism landmark was evacuated following a bomb alert in Paris, France, September 23, 2020. REUTERS/Charles Platiau

French police secure the area near the Eiffel Tower after the French tourism landmark was evacuated following a bomb alert in Paris, France, September 23, 2020. REUTERS/Charles Platiau

French police stand near the Eiffel Tower after the French tourism landmark was evacuated following a bomb alert in Paris, France, September 23, 2020. REUTERS/Charles Platiau

French police stand near the Eiffel Tower after the French tourism landmark was evacuated following a bomb alert in Paris, France, September 23, 2020. REUTERS/Charles Platiau

French police stand near the Eiffel Tower after the French tourism landmark was evacuated following a bomb alert in Paris, France, September 23, 2020. REUTERS/Charles Platiau

A general view shows the courtroom at the Specialised Criminal Court in Sofia, Bulgaria, September 21, 2020, before the start of the trial for the 2012 bus bombing that killed five Israeli tourists and a Bulgarian driver at a Black Sea airport. REUTERS/Stoyan Nenov

A general view shows the courtroom at the Specialised Criminal Court in Sofia, Bulgaria, September 21, 2020, before the start of the trial for the 2012 bus bombing that killed five Israeli tourists and a Bulgarian driver at a Black Sea airport. REUTERS/Stoyan Nenov

A New York Police Department (NYPD) Counterterrorism K-9 Unit officer enters a house, where police say bomb-making materials were found following a fire in the house, in the Queens borough of New York City, New York, U.S., September 16, 2020. REUTERS/Mike Segar

FBI officers work outside a house, where police say bomb-making materials were found following a fire in the house, in the Queens borough of New York City, New York, U.S., September 16, 2020. REUTERS/Mike Segar

An FBI Joint Terrorism Task Force officer removes evidence bags from a house, where police say bomb-making materials were found following a fire in the house, in the Queens borough of New York City, New York, U.S., September 16, 2020. REUTERS/Mike Segar

An FBI Joint Terrorism Task Force officer works outside a house, where police say bomb-making materials were found following a fire in the house, in the Queens borough of New York City, New York, U.S., September 16, 2020. REUTERS/Mike Segar

An FBI Joint Terrorism Task Force officer removes evidence bags from a house, where police say bomb-making materials were found following a fire in the house, in the Queens borough of New York City, New York, U.S., September 16, 2020. REUTERS/Mike Segar

An FBI Joint Terrorism Task Force officer removes evidence bags from a house, where police say bomb-making materials were found following a fire in the house, in the Queens borough of New York City, New York, U.S., September 16, 2020. REUTERS/Mike Segar

FBI officers are seen outside a house, where police say bomb-making materials were found following a fire in the house, in the Queens borough of New York City, New York, U.S., September 16, 2020. REUTERS/Mike Segar

FBI officers work outside a house, where police say bomb-making materials were found following a fire in the house, in the Queens borough of New York City, New York, U.S., September 16, 2020. REUTERS/Mike Segar

An FBI Joint Terrorism Task Force officer enters a house, where police say bomb-making materials were found following a fire in the house, in the Queens borough of New York City, New York, U.S., September 16, 2020. REUTERS/Mike Segar

An FBI officer removes bags with items from a house, where police say bomb-making materials were found following a fire in the house, in the Queens borough of New York City, New York, U.S., September 16, 2020. REUTERS/Mike Segar

Law Enforcement officials investigate outside a house, where police say possible bomb-making materials were found, in the Queens borough of New York City, U.S., September 15, 2020. REUTERS/Brendan McDermid

John Miller, New York Police Department (NYPD) Deputy Commissioner of Intelligence & Counterterrorism speaks during a news conference outside a house, where police say bomb-making materials were found, in the Queens borough of New York City, U.S., September 15, 2020. REUTERS/Brendan McDermid

John Miller, New York Police Department (NYPD) Deputy Commissioner of Intelligence & Counterterrorism speaks during a news conference outside a house, where police say bomb-making materials were found, in the Queens borough of New York City, U.S., September 15, 2020. REUTERS/Brendan McDermid

A Federal Law Enforcement officer works at the scene of an investigation outside a house, where police say possible bomb-making materials were found, in the Queens borough of New York City, U.S., September 15, 2020. REUTERS/Brendan McDermid

Law Enforcement officials investigate outside a house, where police say bomb making materials were found, in the Queens borough of New York City, U.S., September 15, 2020. REUTERS/Brendan McDermid

Law Enforcement officials investigate outside a house, where police say possible bomb-making materials were found, in the Queens borough of New York City, U.S., September 15, 2020. REUTERS/Brendan McDermid

Law Enforcement officials investigate outside a house, where police say possible bomb-making materials were found, in the Queens borough of New York City, U.S., September 15, 2020. REUTERS/Brendan McDermid

Law Enforcement officials investigate outside a house, where police say possible bomb-making materials were found, in the Queens borough of New York City, U.S., September 15, 2020. REUTERS/Brendan McDermid

Iraqi security forces carry the remains of a vehicle at the site of a car bomb at a police checkpoint on the road between Kirkuk and Salahuddin province, Iraq September 1, 2020. REUTERS/Ako Rasheed

A member of Iraqi security forces checks the remains of a vehicle at the site of a car bomb at a police checkpoint on the road between Kirkuk and Salahuddin province, Iraq September 1, 2020. REUTERS/Ako Rasheed

Iraqi security forces check the remains of a vehicle at the site of a car bomb at a police checkpoint on the road between Kirkuk and Salahuddin province, Iraq September 1, 2020. REUTERS/Ako Rasheed

Iraqi security forces carry the remains of a vehicle at the site of a car bomb at a police checkpoint on the road between Kirkuk and Salahuddin province, Iraq September 1, 2020. REUTERS/Ako Rasheed

Iraqi security forces gather near the remains of a vehicle at the site of a car bomb at a police checkpoint on the road between Kirkuk and Salahuddin province, Iraq September 1, 2020. REUTERS/Ako Rasheed

Iraqi security forces gather near the remains of a vehicle at the site of a car bomb at a police checkpoint on the road between Kirkuk and Salahuddin province, Iraq September 1, 2020. REUTERS/Ako Rasheed

Iraqi security forces inspect the remains of a vehicle at the site of a car bomb at a police checkpoint on the road between Kirkuk and Salahuddin province, Iraq September 1, 2020. REUTERS/Ako Rasheed

Iraqi security forces stand near the remains of a vehicle at the site of a car bomb at a police checkpoint on the road between Kirkuk and Salahuddin province, Iraq September 1, 2020. REUTERS/Ako Rasheed

A member of Iraqi security forces stands at the site of a car bomb at a police checkpoint on the road between Kirkuk and Salahuddin province, Iraq September 1, 2020. REUTERS/Ako Rasheed

A member of Iraqi security forces walks at the site of a car bomb at a police checkpoint on the road between Kirkuk and Salahuddin province, Iraq September 1, 2020. REUTERS/Ako Rasheed

Members of security forces stand guard near a billboard depicting Lebanon's former Prime Minister Rafik al-Hariri, who was killed in a 2005 suicide bombing, in Sidon, southern Lebanon, Lebanon August 18, 2020. REUTERS/Aziz Taher