Because people were trying to make it interesting that's why they didn't waned to make it to obvious !(:
Highland Towers collapse happened in 1993.
Skyline Towers collapse happened in 1973.
If the WTC towers did not collapse, they would eventually be due to the extensive damage beyond repair
Aeroplanes
Yes, the North Tower (also referred to as 1 WTC) was the second of the towers to collapse.
2.1 and 2.2
Yes. The twin towers collapsed in September 2001.
No. The world trade center collapsed due to the weakening of the interior structure of the towers
Benzene
2,977 were lost in the collapse of the Twin Towers.
they were built 1966 , they collapse in 2001
The defences of a concentric castle were round towers - It was harder for attackers to make round towers collapse. Unlike square towers they had no corners, which collapsed if holes were dug underneath the foundations.