 Complete the following phrase:  From World Expo 88 in Brisbane onwards, countries started to use expositions as a platform to improve their national image through their pavilions. Finland, Japan, Canada, France, and Spain are cases in point. A major study by Tjaco Walvis called Expo 2000 Hanover in Numbers showed that improving national image was the main goal for 73 of the countries participating in Expo 2000. Pavilions became a kind of advertising campaign, and the Expo served as a vehicle for nation branding. According to branding expert Wally Olins, Spain used 