John McCain can read the 9/11 Commision report, and totally agree with it and respect it. Read the 9/11 Commission Report yourself. http://www.gpoaccess.gov/911/pdf/fullreport.pdf
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If you take the time to read this article, which you should take the time to watch some of the important videos in this blog. And see whether John McCain is answering this question to your liking. Also notice the "hecklers" to the person asking this question. I believe his question and would have asked it myself, probably with a bit more facts to throw at him about the condition and treatment of the 9/11 Workers, who are really heros because of their valiant efforts. They are very sick make sure you watch 9/11 : Truth Rising.