Who are the African-Americans?

Years ago, this was the racial group called "negroes" or "colored people." Today, they are generally called "African-Americans," referring to the fact that many (though not all) black people in the United States originally came from the continent of Africa. Some famous African-Americans in U.S. history include Martin Luther King, Rosa Parks, Harriet Tubman, Colin Powell, Oprah Winfrey, and Barack Obama.