 Complete the following phrase:  Scouts during this time took part in a number of high-profile events, in addition to Jamborees, that helped to boost the image of the movement. These included the 1948 Summer Olympics, as markers for the marathon, in support roles for the games and one even carried the banner for Belgium in the opening ceremony as well as the 1951 Festival of Britain and assisting with crowd control and programme selling at the 1953 