local area or region camping together for a weekend. The events usually have a theme, such as pioneering. World Scout Moots are gatherings, originally for Rover Scouts, but mainly focused on Scout Leaders. Jamborees are large national or international events held every four years, during which thousands of Scouts camp together for one or two weeks. Activities at these events will include games, Scoutcraft competitions, badge, pin or patch trading, aquatics, woodcarving, archery and activities related to the theme of the event. In some countries a highlight of the year for Scouts is spending at least a week in the summer engaging in an outdoor activity. This can be a camping, hiking, sailing, or other trip with the unit, or a summer camp with broader participation (at the council, state, or provincial level). Scouts attending a summer camp work on Scout badges, advancement, and perfecting Scoutcraft skills. Summer camps can operate specialty programs for older Scouts, such as sailing, backpacking, canoeing and whitewater, caving, and fishing. At an international level Scouting perceives one of its roles as the promotion of international harmony and peace. Various initiatives are in train towards achieving this aim including the development of activities that benefit the wider community, challenge prejudice and encourage tolerance of diversity. Such programs include co-operation with non-Scouting organisations including various NGOs, the United Nations and religious institutions as set out in The Marrakech Charter. Uniforms and distinctive insignia The Scout uniform is a widely recognized characteristic of Scouting. In the words of Baden-Powell at the 1937 World Jamboree, it "hides all differences of social standing in a country and makes for equality; but, more important still, it covers differences of country and race and creed, and makes all feel that they are members with one another of the one great brotherhood". The original uniform, still widely recognized, consisted of a khaki button-up shirt, shorts, and a broad-brimmed campaign hat. Baden-Powell also wore shorts, because he believed that being dressed like a Scout helped to reduce the age-imposed distance between adult and youth. Uniform shirts are now frequently blue, orange, red or green and shorts are frequently replaced by long trousers all year or only under cold weather. While designed for smartness and equality, the Scout uniform is also practical. Shirts traditionally have thick seams to make them ideal for use in makeshift stretchers—Scouts were trained to use them in this way