2009 G20 London summit a force for good in the medium term." Leaders of the member countries began to prepare for the London Summit months before the effective date, notably with two official meetings dedicated to that preparation, one held in Berlin, Germany, on 22 February 2009 for European leaders, and another in Horsham, Sussex, United Kingdom, on 14 March 2009 for Finance Ministers. Leaders of the four European Union member countries of the G20, the United Kingdom, Germany, France and Italy along with the two largest European non-members, Spain and the Netherlands, met in Berlin on 22 February 2009 to prepare for the
2017 G20 Hamburg summit being diagnosed with terminal liver cancer. Turkey arrested 12 people in Istanbul on the eve of the G20 summit in Hamburg in July 2017 during the "digital security and information management workshop". They included İdil Eser, the head of Amnesty International Turkey. Activists detained included İlknur Üstün of the Women's Coalition, lawyer Günal Kurşun and Veli Acu of the Human Rights Agenda Association. 63.seven civil society groups that are an integral part of the G20 process. 2017 G20 Hamburg summit The 2017 G20 Hamburg summit was the twelfth meeting of the Group of Twenty (G20), which was held on 7–8