 At most games, the flag has been carried into the stadium by prominent athletes of the host nation, but in 2012, it was carried by an international group of athletes and non-athletes famous for promoting Olympic values, including Muhammad Ali as a symbolic flag-bearer.The flag bearers of all countries then circle a rostrum, where one athlete of the host nation (since the 1920 Summer Olympics), and one judge of the host nation (since the 1972 Summer Olympics) speak the Olympic Oath, declaring they will compete and judge according to the rules of their respective sport.Since the 2012 Summer Olympics in London, continuing with the tradition started at the 2010 Summer Youth Olympics a coach from the host nation speaks out the Olympic Oath.