UN Secretary-General Ban Ki-moon is greeted by dignitaries and protocol officials upon arrival at Pearson International Airport for the two-day G20 Summit in Toronto June 26, 2010. [Agencies]

US President Barack Obama (R) chats with British Prime Minister David Cameron as they prepare to board Marine One from Muskoka Airport near the G8 Summit site, to Toronto for the G20 Summit June 26, 2010. [Agencies]