Yes, and it struck me sometime in the late morning of 9.11.2001: New York is cosmopolitan, huge, somewhat apart from the rest of the country culturally (it really is kind of its own thing), and in some ways an obvious target. To strike an even more pure note of terror, personally I think the even more effective use of four jetliners would’ve been to destroy the tallest buildings in Denver, Kansas City, Dallas, and Phoenix (for example; Cincinnati, Atlanta, Minneapolis, SLC–those would’ve worked too). But of course, for the average terrorist, even the higher-ups, I’d bet their awareness of the US extends only to NYC, WDC, and LA (probably true for a good number of Americans too).