German Chancellor Angela Merkel gives a press conference with the Hungarian Prime Minister during their meeting in the Hungarian-Austrian border town of Sopron on August 19, 2019, to mark the 30th anniversary of the "Pan European Picnic". - During the "Pan-European Picnic" in August 1989 at the Hungarian-Austrian border, at least 600 East Germans crossed the border and escaped to freedom in the West, which became a pivotal moment in the fall of the Iron Curtain. (Photo by Attila KISBENEDEK / AFP)

German Chancellor Angela Merkel gives a press conference with the Hungarian Prime Minister during their meeting in the Hungarian-Austrian border town of Sopron on August 19, 2019, to mark the 30th anniversary of the "Pan European Picnic". - During the "Pan-European Picnic" in August 1989 at the Hungarian-Austrian border, at least 600 East Germans crossed the border and escaped to freedom in the West, which became a pivotal moment in the fall of the Iron Curtain. (Photo by Attila KISBENEDEK / AFP)

German Chancellor Angela Merkel gives a press conference with the Hungarian Prime Minister during their meeting in the Hungarian-Austrian border town of Sopron on August 19, 2019, to mark the 30th anniversary of the "Pan European Picnic". - During the "Pan-European Picnic" in August 1989 at the Hungarian-Austrian border, at least 600 East Germans crossed the border and escaped to freedom in the West, which became a pivotal moment in the fall of the Iron Curtain. (Photo by Attila KISBENEDEK / AFP)

German Chancellor Angela Merkel gives a press conference with the Hungarian Prime Minister during their meeting in the Hungarian-Austrian border town of Sopron on August 19, 2019, to mark the 30th anniversary of the "Pan European Picnic". - During the "Pan-European Picnic" in August 1989 at the Hungarian-Austrian border, at least 600 East Germans crossed the border and escaped to freedom in the West, which became a pivotal moment in the fall of the Iron Curtain. (Photo by Attila KISBENEDEK / AFP)

German Chancellor Angela Merkel gives a press conference with the Hungarian Prime Minister during their meeting in the Hungarian-Austrian border town of Sopron on August 19, 2019, to mark the 30th anniversary of the "Pan European Picnic". - During the "Pan-European Picnic" in August 1989 at the Hungarian-Austrian border, at least 600 East Germans crossed the border and escaped to freedom in the West, which became a pivotal moment in the fall of the Iron Curtain. (Photo by Attila KISBENEDEK / AFP)