Racism againts black american

My topic is racism against black americans. I chose this topic because ever since i was little it always boggles my mind that people could be  so cruel to someone because of their skin color. I was always interested in learning about famous black American heroes like Harriet Tubman and Martin Luther King junior. i chose this topic becasue i want to learn more about how racism still exists today and what we can do to make it a better place to live for everyone.