Comment: Although I'm not buying the official version

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Although I'm not buying the official version

there are a couple elements in the alternative versions that stick in my craw.

1. I've heard that steel buildings are very susceptible to fire damage because, although they seldom get hot enough to melt, they weaken dramatically at temperatures far below melting. Melting point may therefore not have been needed in the WTC collapse.

2. Temperature of jet fuel combustion is not the only heat criterion to consider. What about radiative heat? The fire was large enough to cause radiative heat build-up toward its thermal center, meaning that melting temperatures might have been reached at points in the structure.

An example of how this principle works is the reported cooking of beached whales once their heart stops. The body-temperature heat radiates in all directions and, without the circulatory system carrying it away, the points inside the whale that are surrounded by the most radiating mass build up to temperatures hot enough to cook.

New Hampshire and Ecuador.