|North Tower | 8:46 a.m. : IMPACT
The first plane crashes into the tower's north face near the 96th floor. The impact ignites more than 20,000 gallons of jet fuel and scrapes away fireproofing insulation on the columns and floor trusses, exposing the steel to temperatures as high as 2,000 degrees Fahrenheit from the burning fuel.
Intro | South Tower | Pentagon
GRAPHICS BY DOUG STERN - USN&WR
REPORTING BY AVERY COMAROW, DAVID LAGESSE, AND KENNETH TERRELL-USN&WR