The quote below was written in the 1950s: [A]n iron curtain has descended across the Continent ... [F]amous cities and the populations around them lie in what I must call the Soviet sphere, and all are subject in one form or another, not only to Soviet influence but to a very high and, in some cases, increasing measure of control from Moscow. Source: History Guide With whom is this quote associated? George Marshall Harry Truman George Kennan Winston Churchill