On september 2nd 1998 a Swissair MD-11 crashed into the sea off Novia Scottia:
The report (32 MB PDF)
The impact force was estimated to be in order of at least 350 G in the longitudinal direction. The aircraft did not bounce on impact, instead it was totally shredded. It was so shredded that they gave up on using divers to recover the pieces, they ended up with using a scallop rake and finally they suction dredged the wreckage area, that was 55 meter below the surface, down to a depth of 1,5m.
Photos of the recovery work.
(Note the container with pieces at the bottom of the gallery.)
Pictures from the reconstruction of the forward of the aircraft.
The engines.
Given this, what do the truthers expect should have happened to Flight 93 hitting the ground at much higher speed and steeper angle?