2010 G20 Toronto summit preparations had already begun in advance of the announcement of the meeting venue. Preparations for the important topics to be discussed at the summit evolved in tandem with practical planning for the meeting as a venue and as an event. Plans for the gathering of G8 leaders in Muskoka included an early and continuing investment in security projections which encompassed Toronto and Pearson International Airport. When subsequent decision-making caused Toronto to be named as a site for a G20 summit, some plans needed modification.