根据短文，判断正误。

   My name is Ted Pike. I am a worker in a big store. I don't work in the morning. I only work at night. Every morning I come home at about half past six. I have breakfast at seven. After breakfast I go to bed. I get up at about half past two. I have lunch at a quarter to three and supper at twenty to eight. Then I go to work at a quarter past eight. I start work at nine. I look after the store every night. I like my work very much.

1971年尼克松说：“……同我们在第二次世界大战结束的时候比，美国遇到了我们甚至连做梦也没有想到过的那种挑战。”这里的“挑战”是指（    ）