[Poohbah]

Do you base that on the conclusion that the plane impacted at the location of the waterlines and all the waterlines were located in one place?

No, it means that the sprinkler systems on the floors actually hit were rendered inoperative. F = M*A and all that.

[honway]

Your explanation requires that all the structures and infratructure on one or more floors were disabled as a result of the impact. If so the structure would have collapsed immediately.

Besides all that, what would be the downside of investigating the unlicensed plumber Sakhera Hammad's connection to the world trade center?

Consider these guys all walked on the driver's license fraud. What was the motivation for burning their co-conspirator Ms. Smith alive with gasoline in Odtllah's car if all that was involved was a 4 month time served sentence ? What is the downside in interviewing the owner of the non- existent Denko Mechanical and asking Mr.Davidenko why he provided a letter to the court explaining Hammad was his employ with the alias Sergio Denko. Why not ask Mr. Davidenko who hired his non-existent company to work on the sprinkler system in the WTC with unlicensed Muslim plumbers days before 9-11?

Seriously, Poohbah, none of these questions interest you at all?