In the first frame..., there is no 'horizontal passage' beneath the incoming trajectory.., similar to what passes beneath the 'white smoke' image.
in the second frame..., after the 'whatever' has struck the pentagon..., you will notice a similar 'horizontal passage' continuing to the pentagon.
There can only be two rationale conclusions from this footage:
a: something else struck the pentagon prior to the 'major impact'.
b: the illuminati of the pentagon must presume that the rest of humanity must enjoy the same abundence of imbecility that they theirselves enjoy.