Of course the fires in the World Trade Center occurred within the buildings. The airplanes were not burning until after they collided with the buildings. Engines and tankage came apart, with lots of extremely hot air and released flame. Don't be misled. Diesel fuel and jet fuel are essentially kerosene, and it is a fact that kerosene lamps work every time they are lit. Plenty of airplane crashes resulting in serious fires, enough to melt aluminum fuselages. https://www.cnn.com/2024/01/02/asia/japan-airlines-plane-fire-airport-intl-hnk
Of course the fires in the World Trade Center occurred within the buildings. The airplanes were not burning until after they collided with the buildings. Engines and tankage came apart, with lots of extremely hot air and released flame. Don't be misled. Diesel fuel and jet fuel are essentially kerosene, and it is a fact that kerosene lamps work every time they are lit. Plenty of airplane crashes resulting in serious fires, enough to melt aluminum fuselages. https://www.cnn.com/2024/01/02/asia/japan-airlines-plane-fire-airport-intl-hnk