Highland Towers collapse happened in 1993.
Highland Towers Apartments was created in 1913.
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.
Check with the local housing authority in that jurisdiction.
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.