The use of the word Chinese here is historical-That's what it was called, and should seen in it's historical context.
The word itself is not offensive, unlike the continued use of "chink-a-chink" for a coin trick. (I've seen ordinary coins used and the late Bruce Cervon use bottle caps at The Magic Castle, while clueslessly still calling it "Chink a Chink" to an audience which people of different backgrounds were offended by.)
The "Chinese Linking Rings" shows how things Chinese, for better or worse, have been associated with the mysterious, exotic, and unique. (What do they call it in China?)
"The Albainian Torture Cell"
"The Hawaiian Torture Cell"
They don't sound as good, do they?
(Unless you were ever tortured in Albainia.)
Of course who we are fighting at the time: British, Germans, Japanese, Viet Cong, etc. has more easily linked their names to torture. (Would "The Manchurian Candidate" have worked as well at the time, if it was set in Hungary, instead of China?)
John, while your interest in not offending people is commendable, and it doesn't detract to only call it the WTC, I believe it should be kept in perspective regardless.
Most are not offended by what Houdini billed/depicted his escape 100 years ago, but more, (but not enough) are offended TODAY by the depiction/caricature of Chinese by the cowardly, racist profiteer Jeff Hobson .