What i DON'T believe is that aircraft hits caused collapse of twin towers.
It can't be the physical impact, neither it can be the fire ball of jet fuel.
Going by rules of science and physics, aircraft should have shattered away upon impact, instead of slicing through the thickest concrete+steel columns.
Engineers across the globe have same view.
Besides this, their are forensic indicators, which suggest it's something else. Like the melted steel and concrete residue, which require thousands of degrees of temperature to take place.
Collapse of 3 tower etc.