The head of the United Nations is the Secretary-Genera, who as of January 2011, is Ban Ki-moon.
Secretary General
Secretary of the United Nations
Secretary General of the United Nations
The united nations was created after world war 2
The President of the United States.
Ban Ki-moon is the current Secretary-General of the United Nations (UNSG) .
The secretary general of the United Nations in 1975 was Kurt Waldheim of Austria.
Since it's United Arab Emirates,. I would infer that the leader's title is "Emir". Just a guess.
Prime Minister
"President of the United Mexican States".
There was no one "world leader", but the two main competing nations were the United States and the Soviet Union.
President, or Commander in Chief, commonly abbreviated CinC.
Barack Obama is the President and Commander-In-Chief of the United States of America.