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The U.S. North American Aerospace Defense Command and South Korea’s Defense Ministry said no satellite made it into orbit.

South Korea is due to host the Nuclear Security Summit in Seoul in two weeks, and North Korea’s nuclear program was expected to be discussed on the sidelines of the gathering of world leaders.

Associated Press writers Kim Kwang Hyon and Pak Won Il in Pyongyang; Jean H. Lee, Stephen Wright and Sam Kim in Seoul, South Korea; and Mari Yamaguchi in Tokyo contributed to this report.