Yes, you're quite right that the items in red were added later, and not part of the original FEMA report.

I'll concede that point.

Nevertheless, many of the comments in red retain their relevancy, imo, and should not be disregarded just because you say so.

I haven't yet been able to scrutinze Chpt. 2 in its entirety, but will do so as time allows. For the time being, I'll just emphasize selected passages from the excerpts which you pasted here.

a) FEMA estimates that from one third to one half of the peak total rate of fire energy... flowed out of the structures.

b) ...uncertainty in these estimates...Temperatures may have been as high as 900-1,100 degrees Centigrade (1,700-2,000 degrees Fahrenheit) in some areas and 400-800 degrees Centigrade (800-1,500 degrees Fahrenheit) in others.

c) The modeling also suggests ceiling gas temperatures of 1,000 degrees Centigrade (1,800 degrees Fahrenheit), for all of 5 minutes, until the jet-fuel burnt off...

...and a further relevant excerpt (in black ink, thank you) which you did not paste:

d) Although only limited video footage is available that shows the crash of American Airlines Flight 11 into WTC 1 and the ensuing fireballs, extensive video records of the impact of United Airlines Flight 175 into WTC 2 are available. These videos show that three fireballs emanated from WTC 2 on the south, east, and west faces. The fireballs grew slowly, reaching their full size after about 2 seconds. The diameters of the fireballs were greater than 200 feet, exceeding the width of the building. Such fireballs were formed when the expelled jet fuel dispersed and flames traveled through the resulting fuel/air mixture. Experimentally based correlations for similar fireballs (Zalosh 1995) were used to estimate the amount of fuel consumed. The precise size of the fireballs and their exact shapes are not well defined; therefore, there is some uncertainty associated with estimates of the amount of fuel consumed by these effects. Calculations indicate that between 1,000 and 3,000 gallons of jet fuel were likely consumed in this manner. Barring additional information, it is reasonable to assume that an approximately similar amount of jet fuel was consumed by fireballs as the aircraft struck WTC 1.

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Based on videos that I've seen, the fireballs accompanying the off-axis crash of Flight 175 into the south tower were substantially larger than those recorded for Flight 11's earlier, more direct impact into the north tower. One huge fireball consumed itself almost completely outside the south tower, and must have expended much more of F175's fuel than the 1,000-3,000 gallons estimated by FEMA.

You close with an attack my credibility, but I note that you do not address the seismic data, nor the issue of the pools of molten steel which remained beneath the wreckage of WTC 1, 2 and 7 for perhaps several weeks, nor the issue of the very rapid collapse of both towers, nor the previous precedent of the Meridian fire.

To summarize, selected passages from FEMA's report indicate uncertainty about the maximum fire temperatures reached in the WTC blazes, but acknowledge that a signficant portion of the jet's fuel would have been consumed in fireballs, that the remaining jet fuel would have burnt off within 5 minutes, and that a significant part of the total fire energy flowed out of the building.

For now, I'll leave it there.

sp