nick marsh, bbc news. it was an historic moment captured by the world's media.fists at the 1968 mexico olympics. it was against the rules and they were sent home. now a group of american athletes is calling for the scrapping of the rule which forbids athletes from protesting. i spoke to olympic champion tommie smith and i asked him for his reaction for calls to allow protests. i make if it a very positive idea, positive move, with the athletes now standing up for rights which we should have had way back then. and i am so proud of our young people who are taking the stand of moving society in a forthright situation, where everybody can enjoy the sound of freedom, the sound of equality and the sound of goodness, so people can live together. this modern call, obviously, this is in the wake of black lives matter. what have you made of this uprising, these protests, these changes that we have seen? we've seen a lot of things in these type changes. some are good and, of course, some are bad. you know, for every forward movement, three steps, there is two steps backwar