Ad hominemOk, you picked that nit, the liquefied steel will pool at the lowest point it can flow to.
Ask the ironworkers? Go ahead, ask. Its the 9/11 TM claim, onus is on the claimant to find evidence in support of the claim.
Shifting the burden of proof?
If you think it went to China , find some evidence of that. Rather laughable though, to assume the Communist Chinese govt, receiving evidence of large amounts of steel that had melted in the WTC rubble, would keep it hushed up.
argumentum ex silentio