the first one only used the WTC as an example of a skyscraper, and the second one is flat out WRONG
Edit:
i dont know where you got that quote from, but THIS is what it actually says on that link
Yes, the first link uses the WTC as an example to say:
"Modern skyscrapers such as the World Trade Center, New York, have steel and concrete hull-and-core structures."
For the second quote, I got that from the link you dumbfuck. You don't know how to read. Scroll down the link until you see a diagram showing the concrete core on the right side of the page......then go down a few short paragraphs and you will see:
"The building's design was standard in the 1960s, when construction began on what was then the world's tallest building. At the heart of the structure was a vertical steel and concrete core, housing lift shafts and stairwells. Steel beams radiate outwards and connect with steel uprights, forming the building's outer wall. All the steel was covered in concrete..."
Pay close attention to:
"At the heart of the structure was a vertical steel and concrete core,"
Your reference is talking about the structure around the central core and that is why it says:
"with floor trusses extending across to a central core"
See how it says to a central core? Learn to read dipdick!