Different sources are aimed at different audiences. sometimes a source can be directed at more than a single group of people. are usually aimed at the general population across the globe. some sources may have a very specific audience. can be specifically aimed at students or scholars with a background in literature.

Where did the term “iron curtain” originate? the warsaw pact used the term iron curtain as a code word for communism. in a 1946 speech, british prime minister winston churchill said an iron curtain had fallen across the continent of europe. while visiting western europe in 1946, u.s. president harry truman commented that the mountains there looked like iron curtains. russian general secretary joseph stalin instructed citizens of eastern europe to hang iron curtains over their windows to protect themselves from stray bullets.