However, according to the NIST Final Report

1. Fires on floor 22 were not involved in the critical damage to the building. Also fires first observed 2 hours after debris strikes from WTC 1 on floors 29 & 30, also were not floors with critical damage.

2. No fires moved from floor to floor

3. The floors contributing to the critical fire damage were on 7-9 and 11-13. The earliest evidence of fires on any of these floors was 3 hrs, 40 minutes after the debris struck.