If you consider crashing a passenger airplane randomly into a very tall structure.... Then yes it was. (JK, no it was not a controlled demolition, it was unexpected and random)
The World Trade Center was destroyed by jets crashing into it, absolutely not by controlled demolition.
Whomever ordered the installation of controlled demolition devices in the Twin Towers and WTC 7. See: http://www.foreignpolicyjournal.com/2011/02/14/a-scientific-theory-of-the-wtc-7-collapse/
Inca
The attack on the World Trade Center.
Not enough
No. The world trade center collapsed due to the weakening of the interior structure of the towers
The attack on the world trade center known as 9/11
2001
2001.
in school
No, it was a terrorist attack on the world trade center.
Not enough