When Al-Qaeda themselves claimed responsibility, even with overwhelming evidence aside? Why were so many people still reluctant, I was researching about this stuff and was shocked to see people who I respect a lot believe in this
When Al-Qaeda themselves claimed responsibility, even with overwhelming evidence aside? Why were so many people still reluctant, I was researching about this stuff and was shocked to see people who I respect a lot believe in this
Rebar and concrete
I think that is generally for the floor of each level and for the actual foundation of the structure itself.
The bulk of the primary structure core is just steel, I think. Skyscrapers need to bend and flex with the wind or during earthquakes. (I am not an architect, but I have watched a few TV shows about this stuff in the past. I think.)