[WTC Twin Towers]

I have a question. Why did the North Tower have two small walkways connected to its north and south facades, while the South Tower didn't have any walkways connected to its west and east facades?

These links to photos show that the North Tower had walkways connected to it:

https://www.skyscrapercity.com/cdn-c...1-png.1036729/

https://www.skyscrapercity.com/cdn-c...1-png.1036715/

https://www.skyscrapercity.com/cdn-c...2-png.1036692/

https://www.skyscrapercity.com/cdn-c...4-png.1036712/

https://www.skyscrapercity.com/cdn-c...6-png.1036717/

https://www.skyscrapercity.com/cdn-c...1-png.1036720/

https://www.skyscrapercity.com/cdn-c...1-png.1036726/


These links to photos show that the South Tower didn't have any walkways connected to it:

https://www.skyscrapercity.com/cdn-c...8-png.1036736/

https://www.skyscrapercity.com/cdn-c...0-png.1036743/

https://www.skyscrapercity.com/cdn-c...1-png.1036745/