Because it encouraged later revolutions in other parts of the world. :)
The statement about the Cuban Missile Crisis that is true would be that "<span>d. President Kennedy removed nuclear missiles from Turkey to resolve the crisis," since this was the only way to get the Russians to remove their missiles from Cuba. </span>
One of Nixon's greatest achievements.
Nixon's greatest achievement was president was to open diplomatic relations with the People's Republic of China. Before Nixon, the US and China had had no diplomatic relations. Nixon felt that relations with China could help to put pressure on the Soviet Union. Therefore, he embarked on a secret intiative to open relations with them.