"The story Russ Buettner of the New York Times has filed this morning can
best be described as good old fashioned, get down into the weeds, read public
records journalism. Buettner has determined that between September 17, and
December 16, 2001 Rudy Giuliani spent a total of 29 hours at Ground Zero. His
time at Ground Zero "
This comes no where close to the 12 hour shifts that many people were working in the aftermath of the attack.