Key findings not previously reported by the WTC investigation team include the following: Leading hypotheses for the collapse of WTC 1 and WTC 2 (the towers) developed Time delay between the collapses of the WTC towers explained Post-impact capabilities of the WTC towers assessed Fire-induced core column shortening detected Role of fireproofing determined Majority of steel found stronger than minimum requirements Full-building evacuation presented challenges for occupants Movement in WTC 1 stairwells perceived as a problem Evacuees did not receive coordinated or informative communications Mobility impaired occupants faced special evacuation challenges First responder command and control was hampered Details below.

Promise TV is a home-built personal video recorder (PVR) made out of commodity PC components (primarily LOT of high-capacity hard-drives).