The 767 crashes left impressions out to their wingtips,
but contrary to popular belief, did not sever columns
out to their wingtips.
The intact steel columns under at least the outer 15 feet
of each wing impression are obscured by the broken aluminum
cladding covering the columns.
The comparison of the jet's velocity to a bullet is
since bullets travel up to an order of magnitude faster than jetliners.
It is true, however, that in a 400-mph collision,
the parts of a jet would tend to continue in the direction
of the flight-path rather than accelerating
in directions perpendicular to the flight-path.
Planes tend to break up rather than bend and crumple.