The planes were hijacked by Al-Qaeda terrorrists and deliberately flown into the towers.
Two. One into each tower.
2001 was the year
Yes. Osama Bin Laden ordered suicide bombers to crash planes into the WTC (amongst other buildings).
2001
they used airplanes
The World Trade Centre was not bombed on September 11 2001, two planes were used to crash into the Twin Towers. These planes were hijacked by terrorists who were Muslim extremists who had a very skewed opinion/view of their religion. The men who did this thought it was their religious calling.
Its wasn't a form of government, it was a terriost group whose leader Osama Bin Laden hired a couple of terriosts to hijack 3 planes and crash them into the world trade center (a.k.a. twin towers)
The South Tower of the World Trade Center
2001
2001 was the year
Yes
A plane crash in Tenerife, Canary Islands, killed 583 people in 1977. However, including total casualties and the extent of destruction, the worst plane crashes were the two planes which hit the World Trade Center in New York City in 2001. Two planes, from American and United Airlines were involved, the World Trade Center was destroyed along with the planes, and approximately 2,907 people lost their lives.