Germany's Green party candidate for chancellor Annalena Baerbock and Former German Foreign Minister Joschka Fischer attend the border bridge Slubice as a part of the election campaign tour in Frankfurt (Oder), August 16, 2021. REUTERS/Annegret Hilse 

Germany's Green party candidate for Chancellor Annalena Baerbock and Former German Foreign Minister Joschka Fischer speaks to the media at the border bridge Slubice during an election campaign tour in Frankfurt (Oder), Germany, August 16, 2021. REUTERS/Annegret Hilse 

Germany's Green party candidate for Chancellor Annalena Baerbock and Former German Foreign Minister Joschka Fischer walks near the border bridge Slubice as a part of the election campaign tour in Frankfurt (Oder), Germany, August 16, 2021. REUTERS/Annegret Hilse 

Germany's Green party candidate for Chancellor Annalena Baerbock and Former German Foreign Minister Joschka Fischer stands at the border bridge Slubice as a part of the election campaign tour in Frankfurt (Oder), Germany, August 16, 2021. REUTERS/Annegret Hilse 

Germany's Green party candidate for Chancellor Annalena Baerbock and Former German Foreign Minister Joschka Fischer stands at the border bridge Slubice as a part of the election campaign tour in Frankfurt (Oder), Germany, August 16, 2021. REUTERS/Annegret Hilse 

Former German Foreign minister Joschka Fischer (L) and European parliament member Daniel Cohn-Bendit talk at the sidelines of trilateral talks between German Chancellor Angela Merkel, French President Emmanuel Macron and Ukraine's President Petro Poroshenko before the Charlemagne Prize giving ceremony to Macron in Aachen, Germany, May 10, 2018. Patrick Stollarz/Pool via REUTERS 

Former German Foreign minister Joschka Fischer (L) and European parliament member Daniel Cohn-Bendit talk at the sidelines of trilateral talks between German Chancellor Angela Merkel, French President Emmanuel Macron and Ukraine's President Petro Poroshenko before the Charlemagne Prize giving ceremony to Macron in Aachen, Germany, May 10, 2018. Patrick Stollarz/Pool via REUTERS 

Former German Foreign Minister Joschka Fischer walks during the "Europe Lecture" of the German Institute for Economic Research (DIW) in Berlin, Germany, March 26, 2018. REUTERS/Hannibal Hanschke 

Former German Foreign Minister Joschka Fischer looks on as Christine Lagarde, Managing Director of the IMF, holds a speech during the "Europe Lecture" of the German Institute for Economic Research (DIW) in Berlin, Germany, March 26, 2018. REUTERS/Hannibal Hanschke 

Christine Lagarde, Managing Director of the International Monetary Fund (IMF), sits next to former German Foreign Minister Joschka Fischer during the "Europe Lecture" of the German Institute for Economic Research (DIW) in Berlin, Germany, March 26, 2018. REUTERS/Hannibal Hanschke 

Former German Foreign Minister Joschka Fischer delivers a speech during the traditional St.Matthew's Day banquet (Matthiae-Mahlzeit) in the City Hall in Hamburg, Germany March 2, 2018. REUTERS/Fabian Bimmer 

Former German Foreign Minister Joschka Fischer leaves a stage after his speech during the traditional St.Matthew's Day banquet (Matthiae-Mahlzeit) in the City Hall in Hamburg, Germany March 2, 2018. REUTERS/Fabian Bimmer 

Former German Foreign Minister Joschka Fischer delivers a speech during the traditional St.Matthew's Day banquet (Matthiae-Mahlzeit) in the City Hall in Hamburg, Germany March 2, 2018. REUTERS/Fabian Bimmer 

Former German Foreign Minister Joschka Fischer delivers a speech during the traditional St.Matthew's Day banquet (Matthiae-Mahlzeit) in the City Hall in Hamburg, Germany March 2, 2018. REUTERS/Fabian Bimmer 

Former German Foreign Minister Joschka Fischer delivers a speech during the traditional St.Matthew's Day banquet (Matthiae-Mahlzeit) in the City Hall in Hamburg, Germany March 2, 2018. REUTERS/Fabian Bimmer 

Mayor of Hamburg Olaf Scholz (R), his wife Britta Ernst and President of the European Commission Jean-Claude Juncker (L) look on as former German Foreign Minister Joschka Fischer signs Golden Book of Hamburg during the traditional St.Matthew's Day banquet (Matthiae-Mahlzeit) in the City Hall in Hamburg, Germany March 2, 2018. REUTERS/Fabian Bimmer 

President of the European Commission Jean-Claude Juncker (L) and Mayor of Hamburg Olaf Scholz (R) look on as former German Foreign Minister Joschka Fischer signs Golden Book of Hamburg during the traditional St.Matthew's Day banquet (Matthiae-Mahlzeit) in the City Hall in Hamburg, Germany March 2, 2018. REUTERS/Fabian Bimmer 

Mayor of Hamburg Olaf Scholz (2nd R), his wife Britta Ernst and former German Foreign Minister Joschka Fischer (L) look on as President of the European Commission Jean-Claude Juncker signs Golden Book of Hamburg during the traditional St.Matthew's Day banquet (Matthiae-Mahlzeit) in the City Hall in Hamburg, Germany March 2, 2018. REUTERS/Fabian Bimmer 

President of the European Commission Jean-Claude Juncker (R) and former German Foreign Minister Joschka Fischer attend the traditional St.Matthew's Day banquet (Matthiae-Mahlzeit) in the City Hall in Hamburg, Germany March 2, 2018. REUTERS/Fabian Bimmer 

President of the European Commission Jean-Claude Juncker (R) and former German Foreign Minister Joschka Fischer attend the traditional St.Matthew's Day banquet (Matthiae-Mahlzeit) in the City Hall in Hamburg, Germany March 2, 2018. REUTERS/Fabian Bimmer 

Mayor of Hamburg Olaf Scholz (R to L), President of the European Commission Jean-Claude Juncker, Scholz's wife Britta Ernst and former German Foreign Minister Joschka Fischer pose for a picture before the traditional St.Matthew's Day banquet (Matthiae-Mahlzeit) in the City Hall in Hamburg, Germany March 2, 2018. REUTERS/Fabian Bimmer 

Mayor of Hamburg Olaf Scholz (R to L), President of the European Commission Jean-Claude Juncker, Scholz's wife Britta Ernst and former German Foreign Minister Joschka Fischer pose for a picture before the traditional St.Matthew's Day banquet (Matthiae-Mahlzeit) in the City Hall in Hamburg, Germany March 2, 2018. REUTERS/Fabian Bimmer 

Mayor of Hamburg Olaf Scholz (R to L), his wife Britta Ernst and former German Foreign Minister Joschka Fischer pose for a picture before the traditional St.Matthew's Day banquet (Matthiae-Mahlzeit) in the City Hall in Hamburg, Germany March 2, 2018. REUTERS/Fabian Bimmer 

Former Swiss transport minister Adolf Ogi (R) talks with former German foreign minister Joschka Fischer before the opening ceremony of the NEAT Gotthard Base Tunnel, the world's longest and deepest rail tunnel, near the town of Erstfeld, Switzerland June 1, 2016. REUTERS/Arnd Wiegmann 

Former German foreign minister Joschka Fischer gestures during an interview with Reuters in Berlin October 13, 2014. Six years ago European leaders gathered in Paris to discuss a joint response to the financial earthquake that was shaking their continent. France and several other states pushed for the creation of a European fund to help the bloc cope. But Germany's Angela Merkel ruled out a common approach, insisting instead that each country come up with its own plan to combat what would turn out to be the worst financial crisis since the Great Depression. In his new book "Is Europe Failing?", Fischer traces what he describes as a dangerous unravelling of the European project back to the events in Paris in October 2008, when Merkel chose to go it alone. Picture taken October 13, 2014. To match Interview: GERMANY-EUROPE/FISCHER. REUTERS/Hannibal (GERMANY - Tags: POLITICS BUSINESS) 

Former German foreign minister Joschka Fischer gestures during an interview with Reuters in Berlin October 13, 2014. Six years ago European leaders gathered in Paris to discuss a joint response to the financial earthquake that was shaking their continent. France and several other states pushed for the creation of a European fund to help the bloc cope. But Germany's Angela Merkel ruled out a common approach, insisting instead that each country come up with its own plan to combat what would turn out to be the worst financial crisis since the Great Depression. In his new book "Is Europe Failing?", Fischer traces what he describes as a dangerous unravelling of the European project back to the events in Paris in October 2008, when Merkel chose to go it alone. Picture taken October 13, 2014. To match Interview: GERMANY-EUROPE/FISCHER. REUTERS/Hannibal (GERMANY - Tags: POLITICS BUSINESS) 

Former German foreign minister Joschka Fischer gestures during an interview with Reuters in Berlin October 13, 2014. Six years ago European leaders gathered in Paris to discuss a joint response to the financial earthquake that was shaking their continent. France and several other states pushed for the creation of a European fund to help the bloc cope. But Germany's Angela Merkel ruled out a common approach, insisting instead that each country come up with its own plan to combat what would turn out to be the worst financial crisis since the Great Depression. In his new book "Is Europe Failing?", Fischer traces what he describes as a dangerous unravelling of the European project back to the events in Paris in October 2008, when Merkel chose to go it alone. Picture taken October 13, 2014. To match Interview: GERMANY-EUROPE/FISCHER. REUTERS/Hannibal (GERMANY - Tags: POLITICS BUSINESS) 

Former German foreign minister Joschka Fischer gestures during an interview with Reuters in Berlin October 13, 2014. Six years ago European leaders gathered in Paris to discuss a joint response to the financial earthquake that was shaking their continent. France and several other states pushed for the creation of a European fund to help the bloc cope. But Germany's Angela Merkel ruled out a common approach, insisting instead that each country come up with its own plan to combat what would turn out to be the worst financial crisis since the Great Depression. In his new book "Is Europe Failing?", Fischer traces what he describes as a dangerous unravelling of the European project back to the events in Paris in October 2008, when Merkel chose to go it alone. Picture taken October 13, 2014. To match Interview: GERMANY-EUROPE/FISCHER. REUTERS/Hannibal (GERMANY - Tags: POLITICS BUSINESS) 

German former foreign minister Joschka Fischer and his wife Minu Barat arrive on red carpet for the screening of the movie Yi Dai Zong Shi, "The Grandmaster" at the 63rd Berlinale International Film Festival in Berlin February 7, 2013. The 2013 Berlin film festival kicks off on Thursday with "The Grandmaster", a martial arts epic from Hong Kong director Wong Kar Wai who is also presiding over this year's jury. REUTERS/Fabrizio Bensch (GERMANY - Tags: ENTERTAINMENT)

Former German Foreign Minister Joschka Fischer (C) talks during a panel discussion as former Spanish Prime Minister Felipe Gonzalez (L) and former Belgian Prime Minister Guy Verhofstadt listen at the Nicolas Berggruen Conference in Berlin, October 30, 2012. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS BUSINESS) 

Former Greek Prime Minister George Papandreou (2nd R) talks during a panel discussion at the Nicolas Berggruen Conference in Berlin October 30, 2012. Also pictured are: former Spanish Prime Minister Felipe Gonzalez (3rd L), former German Foreign Minister Joschka Fischer (L), former Belgian Prime Minister Guy Verhofstadt (2nd L) and Philipp Misfelder of the Christian Democratic Union (CDU). REUTERS/Thomas Peter (GERMANY - Tags: POLITICS BUSINESS) 

Former Greek Prime Minister George Papandreou (R), former German Foreign Minister Joschka Fischer, World Trade Organization (WTO) Director-General Pascal Lamy (2nd L) and European Parliament President Martin Schulz (L) attend the Nicolas Berggruen Conference in Berlin, October 30, 2012. REUTERS/Thomas Peter (GERMANY - Tags: BUSINESS POLITICS) 

Former German Foreign Minister Joschka Fischer reacts as he attends a plenary session during the World Policy Conference at the historic Hofburg palace in Vienna December 11, 2011. The World Policy Conference is devoted to the issue of global governance in all its aspects and takes place from December 9 to 11. REUTERS/Herwig Prammer (AUSTRIA - Tags: POLITICS) 

Former German Foreign Minister and REWE consultant Joschka Fischer attends a news conference in Vienna September 6, 2011. REUTERS/Herwig Prammer (AUSTRIA - Tags: BUSINESS EMPLOYMENT) 

Former German Foreign Minister and REWE consultant Joschka Fischer (L) briefs the media next to REWE CEO Frank Hensel during a news conference in Vienna September 6, 2011. REUTERS/Herwig Prammer (AUSTRIA - Tags: BUSINESS EMPLOYMENT) 

Former German foreign minister Joschka Fischer and his wife Minu Barati arrive at the red carpet for the opening U.S. movie 'True Grit' at the 61st Berlinale International Film Festival in Berlin February 10, 2011. The Berlinale International Film Festival runs from February 10 to 20, 2011. REUTERS/Tobias Schwarz (GERMANY - Tags: ENTERTAINMENT)

Film producer Minu Barati-Fischer, wife of former German foreign minister Joschka Fischer, attends a show at the Berlin Fashion Week Autumn/Winter 2011 in Berlin, January 21, 2011. REUTERS/Tobias Schwarz (GERMANY - Tags: FASHION ENTERTAINMENT) 

Joschka Fischer, former German Foreign Minister and Group of Eminent Persons of the Council of Europe Chairman, talks during a news conference in Istanbul January 14, 2011. REUTERS/Murad Sezer (TURKEY - Tags: POLITICS) 

Joschka Fischer, former German Foreign Minister and Group of Eminent Persons of the Council of Europe Chairman, and Turkey's Foreign Minister Ahmet Davutoglu (R) shake hands during a news conference in Istanbul January 14, 2011. REUTERS/Murad Sezer (TURKEY - Tags: POLITICS) 

Joschka Fischer, former German Foreign Minister and Group of Eminent Persons of the Council of Europe Chairman, and Turkey's Foreign Minister Ahmet Davutoglu (R) attend a news conference in Istanbul January 14, 2011. REUTERS/Murad Sezer (TURKEY - Tags: POLITICS) 

Joschka Fischer, former German Foreign Minister and Group of Eminent Persons of the Council of Europe Chairman, talks during a news conference in Istanbul January 14, 2011. REUTERS/Murad Sezer (TURKEY - Tags: POLITICS) 

Film producer Minu Barati-Fischer, wife of former German foreign minister Joschka Fischer, poses on the red carpet as she arrives for the premiere of the musical "Hintern Horizont" (Behind the Horizon) in Berlin January 13, 2011. REUTERS/Tobias Schwarz (GERMANY) 

German film producer Minu Barati-Fischer, wife of former German foreign minister Joschka Fischer, arrives on the red carpet for the 62nd Bambi media awards ceremony in Potsdam November 11, 2010. Each year, German media company 'Hubert Burda Media', honours celebrities from the world of entertainment, literature, sports and politics with the Bambi awards. REUTERS/Thomas Peter (GERMANY - Tags: ENTERTAINMENT POLITICS)

Former German foreign minister Joschka Fischer and his wife Minu Barati arrive for the screening of the movie "Tuan Yuan" (Apart Together) at the 60th Berlinale International Film Festival in Berlin February 11, 2010. REUTERS/Christian Charisius (GERMANY) 

Former German Foreign minister Joschka Fischer and his wife Minu Barati arrive for the ceremony for the Deutscher Nachhaltigkeitspreis (German Sustainability prize) in Berlin, April 29, 2009. Britain's Prince Charles will be decorated with this award in the German capital on Wednesday evening. REUTERS/Tobias Schwarz (GERMANY POLITICS ROYALS) 

Former German foreign minister Joschka Fischer and his wife Minu Barati applaud during the "Cinema for Peace 2009" charity gala at the 59th Berlinale film festival in Berlin, February 9, 2009. REUTERS/Jens Kalaene/Pool (GERMANY) 

Former German foreign minister Joschka Fischer (L) talks with Italian fashion designer Nino Cerruti during a reception before the screening of the movie 'Adam Resurrected' at the 59th Berlinale film festival in Berlin, February 7, 2009. REUTERS/Tobias Schwarz (GERMANY) 

Former German foreign minister Joschka Fischer and his wife Minu Barati arrive at a reception before the screening of the movie 'Adam Resurrected' at the 59th Berlinale film festival in Berlin, February 7, 2009. REUTERS/Tobias Schwarz (GERMANY) 

Former German Foreign Minister Joschka Fischer (R) and his girlfriend Minu Barati arrive for the opening ceremony of the 59th Berlinale film festival in Berlin, February 5, 2009. REUTERS/Tobias Schwarz (GERMANY) 

Former German Foreign Minister Joschka Fischer addresses the media during a break in a parliamentary inquiry commission hearing in Berlin December 18, 2008. The commission is investigating the role of German's Bundesnachrichtendienst BND (foreign intelligence service) during the Iraq war in 2003. REUTERS/Fabrizio Bensch (GERMANY) 

A combination of two pictures shows Former German Foreign Minister Joschka Fischer (L) and current German Foreign Minister Frank-Walter Steinmeier as they wait for the start of a parliamentary inquiry commission hearing in Berlin December 18, 2008. The commission is investigating the role of German's Bundesnachrichtendienst BND (foreign intelligence service) during the Iraq war in 2003. REUTERS/Fabrizio Bensch (GERMANY) 

Former German Foreign Minister Joschka Fischer leaves a parliamentary inquiry commission hearing in Berlin December 18, 2008. The commission is investigating the role of Germany's Bundesnachrichtendienst BND (foreign intelligence service) during the Iraq war in 2003. REUTERS/Hannibal Hanschke (GERMANY) 

Former German Foreign Minister Joschka Fischer is surrounded by media as he leaves a parliamentary inquiry commission hearing for a break in Berlin December 18, 2008. The commission is investigating the role of German's Bundesnachrichtendienst BND (foreign intelligence service) during the Iraq war in 2003. REUTERS/Fabrizio Bensch (GERMANY) 

Former German Foreign Minister Joschka Fischer is surrounded by the media as he leaves to take a break during a parliamentary inquiry commission hearing in Berlin December 18, 2008. The commission is investigating the role of German's Bundesnachrichtendienst BND (foreign intelligence service) during the Iraq war in 2003. REUTERS/Fabrizio Bensch (GERMANY) 

Former German Foreign Minister Joschka Fischer leaves a parliamentary inquiry commission hearing for a break in Berlin December 18, 2008. The commission is investigating the role of German's Bundesnachrichtendienst BND (foreign intelligence service) during the Iraq war in 2003. REUTERS/Fabrizio Bensch (GERMANY) 

Former German Foreign Minister Joschka Fischer leaves a parliamentary inquiry commission hearing for a break in Berlin December 18, 2008. The commission is investigating the role of German's Bundesnachrichtendienst BND (foreign intelligence service) during the Iraq war in 2003. REUTERS/Fabrizio Bensch (GERMANY) 

Former German Foreign Minister Joschka Fischer arrives for a parliamentary inquiry commission hearing in Berlin December 18, 2008. The commission is investigating the role of German's Bundesnachrichtendienst BND (foreign intelligence service) during the Iraq war in 2003. REUTERS/Fabrizio Bensch (GERMANY) 

Former German Foreign Minister Joschka Fischer (C) faces a parliamentary inquiry commission hearing in Berlin December 18, 2008. The commission is investigating the role of German's Bundesnachrichtendienst BND (foreign intelligence service) during the Iraq war in 2003. REUTERS/Fabrizio Bensch (GERMANY) 

Former German Foreign Minister Joschka Fischer arrives for a parliamentary inquiry commission hearing in Berlin December 18, 2008. The commission is investigating the role of German's Bundesnachrichtendienst BND (foreign intelligence service) during the Iraq war in 2003. REUTERS/Fabrizio Bensch (GERMANY) 

Former German Foreign Minister Joschka Fischer looks up before the start of a parliamentary inquiry commission hearing in Berlin December 18, 2008. The commission is investigating the role of Germany's Bundesnachrichtendienst BND (foreign intelligence service) during the Iraq war in 2003. REUTERS/Fabrizio Bensch (GERMANY)