It seems many JREF members have faint ideas what strain energy is. This may explain many misunderstandings of the WTC destructions.
So here we go:
From NIST report - NISTNCSTAR1-6D chapter 5.2 - we learn:
"The aircraft impacted the north wall of WTC 1 at 8:46 a.m. … between Floor 93 and Floor...
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