Land of the Free?

For the past week or so Colin Kaepernick, the quarterback of the San Francisco 49ers, has been the subject of many conversations regarding his decision to not stand during the singing of the National Anthem during pre-game for several football games.  Kaepernick's reasoning for not standing during the National Anthem, simple America isn't great.  Why did he say that America wasn't great, because of the much injustice that is taking place within this land that is the land of the free.  Or is it really the land of the free?