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In page Junko Yagami:

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However, the terrorist attacks on the United States occurred on 11 September 2001. Yagami was shocked and scared to fly.[1] In addition, one week before the terrorist attack, three friends' families were shot dead by an acquaintance at home in California, where she lived at that time, and she was unable to leave her children from fear and cancelled the concert schedule. After the terrorist attack, it became difficult to plan a concert by going back and forth between Japan and the United States in the unstable social situation in the United States.[1] Therefore, at the end of the Christmas concert in 2001, the annual concert in Japan was suspended.[citation needed]