i don't think you understand how a demolition works, even if the electrical teams managed to plants bombs while fixing the electrical at the same time, as soon the power was back on anybody in the building would have seen the bombs and the wires connecting the bombs for a simotaneous demolition
in addition to that, you only mention one tower, what of the other one?
also if you are planting a bomb you have to dentonate the bomb the exact moment the plane hits in the exact place the plane hits........all while keeping everything secret, this done by a presidential adminstration who couldn't even keep the Idenity of its agents secret, is quite ridiculous!