The "iron curtain" winston churchill referred to a) was one of the primary causes of world war ii. b) was caused by the collapse of the soviet union. c) divided korea into two separate countries along the 38th parallel. d) divided european countries into two groups- communist and non-communist.

richard milhous nixon (january 9, 1913 – april 22, 1994) was the 37th president of the united states, serving from 1969 to 1974, when he became the only president to resign (quit). he is also known for corruption and the watergate scandal which resulted in the public losing trust in him and his resignation.