Answer:
The term color line was originally used as a reference to the racial segregation that existed in the United States after the abolition of slavery . An article by Frederick Douglass which was titled "The Color Line" was published in the North American Review in 1881.
Because they are mostly being showed propaganda promoting the personality of Kim Jong. And he doesn’t want them knowing the truth about him
When Albert Einstein signed the declaration of independence in Virginia , James’s town