The United States has requested a closed-door meeting of the United Nations Security Council on North Korea's latest missile launch, a spokesman for the US mission to the United Nations said on Tuesday.The spokesman said the meeting of the 15-member council was likely to be scheduled for Wednesday. Pyongyang said on Tuesday it had successfully test-launched a first intercontinental ballistic missile, or ICBM, which analysts said could put all of Alaska in range for the first time.