that was olympic runner tommie smith in september of 1967., smith would join other black athletes in voting to completely boycott the 1968 summer olympics in mexico city. they vowed to do so in protest of racial inequality here in america. at the time, smith told reporters why. saying, quote, on the track, you're tommie smith, the fastest man in the world, but once you're in the dressing rooms, you are nothing more than a dirty negro. ultimately, the entire american delegation did compete at the 1968 olympics, but it was not without protest. >> john carlos and tommie smith, negro runners, who won medals in the 200-meter race today were ordered by the united states olympic committee to leave mexico. earlier, they were suspended for raising black-gloved fists while "the star spangled banner" was being played at an awards ceremony. >> that picture, that picture of tommie smith and john carlos, heads bowed, with their hands raised in protest, black-gloved fists. that became one of the most enduring images in sports history. but it is far from the

. >> osgood: will smith costarted with tommy lee jones in this science fiction comedy "men in black" back in 1997. by contrast his latest film "concussion" is grounded in science fact. his performance as a researcher into football safety won him a golden globe nomination just this past week. all in all, pretty good grist for questions from our tracy smith. >> i found a disease that no one has ever seen. >> what bothered you most about taking on this role? >> i'm a football dad. and my son, trey played for four years at oaks christian, which is a football power house. beautiful times in my life as a parent, the bonding, the excitement for the family, the friday night lights. i loved it. so, you know, when he r i received this screen play, i was -- i was really conflicted. >> repetitive head trauma. turns you into someone else. >> i really don't want to be that guy. >> the guy who -- reseals that playing football could potentially cause brain damage. >> the movie "concussion" will smith is the dr. bennett omalu, the nigerian-born pathologist who found out what kind of damage the repeat