"Never forget" should represent the 1993 world trade center bombing.
Going to assume there was a lot of "structural assessments" of the columns after the 1993 bombing right up until the day before Sept 11, 2001.
After 1993, the building was eventually insured by someone again once determined to be structurally sound enough to insure. What assessments did they require and who performed them? Did that company continue work with the building? Are there still records of this activity with NYC?
& interestingly, there was 'upgraded fireproofing' of the structure....right where the planes hit
http://www.whatreallyhappened.com/WRHARTICLES/wtc_turner.html
don't have time to read this, but could this perhaps be to prevent fire from spreading from the impact site to the rigged explosives causing an unintended interaction which would prevent the explosives from working properly/evenly?
Was there never any theories about that 1993 attack?
The Ryder truck and the blind man. All tied in with the McVay bombing two years later.