Ecc 9:11 I returned, and saw under the sun, that the race is not to the swift, nor the battle to the strong, neither yet bread to the wise, nor yet riches to men of understanding, nor yet favour to men of skill;
but time and chance happeneth to them all.
Luk 13:1 There were present at that season some that told him of the Galilaeans, whose blood Pilate had mingled with their sacrifices.
Luk 13:2 And Jesus answering said unto them, Suppose ye that these Galilaeans were sinners above all the Galilaeans, because they suffered such things?
Luk 13:3 I tell you, Nay: but, except ye repent, ye shall all likewise perish.
Luk 13:4 Or those eighteen,
upon whom the tower in Siloam fell, and slew them, think ye that they were sinners above all men that dwelt in Jerusalem?
Luk 13:5 I tell you, Nay: but, except ye repent, ye shall all likewise perish.
Two good scriptures to answer the question of why did those folks get killed on 9-11.....