Robert Cronk, een (mormoonse) softwareprogrammeur uit Utah, is een discussie aangegaan met Steven Jones over het instorten van de WTC torens. Jones, zo weten vaste lezers van dit blog, denkt dat thermiet of een variant daarvan is gebruikt om de stalen basisverbindingen van de torens te verzwakken. Veel bewijs heeft Jones daarvoor tot nu toe niet kunnen aandragen en of er het nog van komt is zeer de vraag: Jones is immers op nonactief gesteld, vertrokken bij de universiteit waar hij werkzaam was en voor toekomstig onderzoek aangewezen op privé-financiering.
Cronk wijst Jones op een aantal zaken die de hoogleraar maar koppig blijft negeren en voegt er interessante informatie aan toe: "The firefighters at WTC 7 say that there was a huge 20-story tall hole down the south side of WTC 7 that went inside the building 1/4 to 1/2 of the depth of the building, there was a large bulge between floors 10 and 13 that they put a transit on to measure its movement to predict collapse potential, there were strange creaking noises coming out of WTC 7, the building was leaning to one side, they saw from the structural damage combined with transit and laser doppler vibrometer data (another tool used to measure collapse potential) that the building would soon collapse on its own."
"There is also the Madrid Windsor Tower that is often used to show that a huge raging fire didn’t destroy a building, but only selected photos are used. Look here to see the photos the conspiracy theorists don’t want you to see. Yes, if you look at the side of the building they don’t show you (that’s a recurring theme) the steel collapsed but the cement remained at the Windsor Madrid tower."
"Consider the research of Asif Usmani - a structural engineer from Edinburgh University who specializes in fire’s effect on structures. He contends that the steel didn’t need to melt or even loose much strength - all it had to do was expand. The floors of the towers expanded with fire across three floors. These floors buckled (as is shown in photos) because they couldn’t push the core in or the outer walls out. Once they buckled, the load was transferred to adjacent floors and also through the hat truss to the core. As each floor buckled, more load was put on the core until a global collapse initiated. The outer walls buckled inward up to 55 inches before the collapse, just as his computer models predicted. His models took about 50 minutes to collapse completely and the temperatures were fairly low."
Het eindoordeel van Cronk: "Regardless of the reason that he put this in his paper originally, it stinks like anti-war agenda bias and it weakens his objectivity. Could it be just another glimpse into his underlying belief driving what I think is his practice of pathological science - where his underlying belief drives the types of data he looks for? You decide."