Documentary exploring basketball, and the game's modern roots on the blacktop courts of urban America and charts its rise to one of the most popular sports in the world.Documentary exploring basketball, and the game's modern roots on the blacktop courts of urban America and charts its rise to one of the most popular sports in the world.Documentary exploring basketball, and the game's modern roots on the blacktop courts of urban America and charts its rise to one of the most popular sports in the world.