Apparently, Rudy Giuliani did as much as any rescue worker on 9/11:

I was at ground zero as often, if not more, than most of the workers. ... I was there working with them. I was exposed to exactly the same things they were exposed to. So in that sense, I'm one of them."

Well, sure...of course no mere rescue worker could compare to the grander, braver, larger-than-life St. Rudy. This doesn't answer the real question, though: has he sacrificed as much as Romney's sons?