I just caught this. On Urban Elephants' thread officially announcing the Giuliani candidacy, 'GOPNY' left a comment that included this remark:

The adoration he's received from 9/11 -- mostly because he gave voice to our city's collective grief -- will disappear quickly in a general election campaign, when people will start questioning why he had a command center at the most vulnerable target in NY; why he never unified command between the NYPD and FDNY on that day (police choppers could not tell firefighters the towers were in danger of collapse); why he took no action to improve the repeaters on the firemen's radios (something that had been warned about well, well, before 9/11); why Bernie Kerik was essentially AWOL from One Police Plaza and basically acting as Rudy's "bodyguard" that day; why he changed command centers at least three times on 9/11; why he exposed nearly every city official under him to attack by leading the parade of them up from lower Manhattan...

Now where have I heard that exact same litany of Rudy's 9/11 failings before?

Kidding, actually - much of that comes from Wayne Barrett's excellent work...and even Republicans are forced to notice.