No the fire alone did not cause it to fallThe plane moving 500+ knots causing enough structural damage to key columns.  The fuel burning hot enough to weakening the steel and cause it toï»¿ sag hindered its ability to sustain its own weight.  Once the top gave way its easy to conceive that it was unable to hold itself up.I don't understand why this is so hard to understand.  One taken on its own might not do it, but combined...And no, the conspiracies will not go away.