During the Cuban Missile Crisis, a spy provided the US with important information on Soviet nuclear missile placement. The Soviet Union would later discover that this spy was Oleg Penkovsky, a colonel in Soviet military intelligence. Through recently gathered footage, we can get a clearer sense of the hidden struggle that occurred during the Cold War between the 2 super powers. As the Vietnam War intensified in the late 60s, the CIA and US military began an operation to eliminate communists in South Vietnam.