in 1921, it's greenwood district was a bustling cup black-owned district, knonown as black wall streetit was razed to the ground by white mobs, 300 people killed. >> out black men fought courageously -- our black men fought credibly to defend their homes, businesses and families and they were eventually outnumbered and outguned, that white rioters through those barriers and invaded the greenwood district. and the massacre had begun. >> 99 years later, many tulsa residents are still affected by racism. they say donald trtrump is not welcome. >> our community is still emotionally charged and still hurt, still hurting. and suffering. this is not a time for him to visit the greenwood district. >> but the rally will take place, only on saturday. there is little help -- hope here that it will contribute to unity and healing. not far from the greenwood district, trump supporters have been kept out for days and thousands are expected to arrive on saturday. lack lives matter protesters plan a demonstration and fear the potential for violence. the city has imposed curfew around the venue for tru