Why don't students take history in grade 9

Did north or south korea forces advance further into the other’s territory?

Why would the free rider problem prevent a private business from investing in the building of a city sidewalk?

The term “iron curtain” was based on an actual iron curtain that german theaters used to separate the stage from the audience in case of a fire. who or what did the “iron curtain” of the cold war separate? democratic nations from communist nations the soviet union from its allies the united states from europe europe from asia