Which statesman popularized the term the iron curtain in a 1946 speech?

Winston Churchill used the "Iron Curtain" as a metaphor for the border Russia had created between western and eastern Europe.

(202 bc - 220 ad) dynasty started by lui bang; a great and long-lasting rule, it discarded the harsh policies of the qin dynasty and adopted confucian principles; han rulers chose officials who passed the civil service exams rather than birth; it was a time of prosperity