2009 G20 London summit London Summit and to co-ordinate their actions. The meeting was organised at the initiative of German Chancellor Angela Merkel. The leaders agreed that markets, financial institutions and the wide range of financial assets they create, and hedge funds should be subject to appropriate control. In addition, they called for effective sanctions against tax havens. They also agreed to impose sanctions against countries that intend to undermine their work. Finally, they advocated the doubling of funds available to the IMF. Finance ministers and central bankers of the G20 met in Horsham on 14 March 2009 to prepare for the London Summit.
2017 G20 Hamburg summit during the summit. In the weeks prior to the summit, sporadic car fires in remote places, such as the neighborhood of Blankenese, occurred regularly in the city. On the night of 18 June 2017, unidentified individuals in Berlin, Hamburg, Cologne, Dortmund, Leipzig, and Bad Bevensen caused a total of 13 arson attacks on tracks of the German railways. A security expert was quoted by the German press agency DPA as saying that a connection to left-wing extremism related to the upcoming G20 Summit was "conceivable". According to a German interior ministry spokesman, cable fires had been caused by "unconventional explosive