59 people
30-70 people
None
I dont know i would guess 249
The attack of September 11 took place in New York, by the Pentagon. Planes crashed into the Pentagon and killed many people. (I know this because this date is my birthday... I studied it.) :)
Four planes were hijacked. Two crashed into the World Trade Center, one crashed into the Pentagon, and one crashed in a field.
Many people all around the world were making airplanes from 1897 on, most of them crashed after a few feet.
59 people on board Flight 77 (excluding the five hijackers) which crashed into the Pentagon, and 125 people inside the building. So a total of 184 people, or if you count the hijackers, 189.
It has happened two times I believe
That question is un-answerable, as many people were building flying machines around 1900. Many never even flew, and many others crashed (but were all 'made'.)
Four planes, two hit the World Trade Centers, another crashed into the side of the pentagon, and a fourth crashed in a Pennsylvania field.
There were four. Two were flown into the World Trade Center towers, one into the Pentagon, and one crashed into a Pennsylvanian field when a number of the passengers bravely overcame the hijackers and prevented the plane also crashing into another target, probably the White House, and causing a much greater loss of life.
Two planes crashed into the Twin Towers in New York on 9-11. Additionally a third plane was crashed into the Pentagon near Washington D.C. and a fourth crashed in a forest in Pennsylvania after the passengers fought the hijackers.