Intense Heat Persisted for Months

• Fires continued to burn deep in the rubble pile for 100 days, despite the spraying of water onto the pile.
• When the rubble was cleared, pools of previously melted steel were discovered at the foundations.
• Temperatures needed to melt steel (1535º+ C) could not have been caused by residual hydrocarbon fires. A blast furnace is normally required to melt large pieces of steel.