United States and the United Nations the invasion of South Korea by North Korean troops, leading to the UN sanctioned Korean War. Later, the U.S. persuaded all permanent members of the Security Council to authorize force against Iraq after it invaded Kuwait in 1991. This was a major step toward U.S. and Russian reconciliation after the end of the Cold War. Since 1991, the United States has been the world's dominant military, economic, social, and political power (not to mention hosting the UN Headquarters itself in New York City); the United Nations was not designed for such a unipolar world with a single superpower, and conflicts
Headquarters of the United Nations as well as a deck over FDR Drive on the headquarters' eastern side. To fit in with the accelerated schedule of construction, the steel would have to be delivered by September. The project also included a four-lane, $2.28 million vehicular tunnel under First Avenue so that traffic could bypass the headquarters when the UN was in session. The tunnel started construction on August 1, 1949. The tunnel involved two years of planning due to its complexity. Property inside Tudor City, just west of the headquarters, was also acquired so that two streets near the UN headquarters could be widened. The