G2, G3, G7, G8, G20…

A G20 summit was held in Pittsburgh on 24-5 September 2009.  Hosted by President Obama, there was quite a turnout.  Leaders in attendance were:
States
Argentina   Cristina Fernández de Kirchner President
Australia   Kevin Rudd     Prime Minister
Brazil   Luiz Inácio Lula da Silva  President
Canada   Stephen Harper    Prime Minister
China   Hu Jintao     President
France   Nicolas Sarkozy    President
Germany   Angela Merkel    Chancellor
India    Manmohan Singh    Prime
Indonesia   Susilo Bambang Yudhoyono  President
Italy   Silvio Berlusconi    Prime Minister
Japan   Yukio Hatoyama    Prime Minister
Mexico [...]