The hijacked Flight 175 struck floors 77 to 85 of the South Tower (2 WTC) 17 minutes later at 9:03 a.m. When the towers were struck, between 16,400 and 18,000 people were in the WTC complex. Of those, the vast majority evacuated safely.
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The North Tower lasted around 46 minutes longer than its twin, having been struck 17 minutes before the South Tower was attacked and standing another half-hour after the South Tower collapsed.
#1: The Tenerife Airport DisasterThe deadliest aviation accident in history actually occurred while on the ground, not in the air. In 1977, two fully loaded Boeing 747 passenger jets collided in the middle of a runway on Tenerife Island, killing 583 people.
Each of the Twin Towers had 110 floors. Each tower's footprint and floors were approximately an acre in size. On windy days, each tower could sway up to almost 12 inches side to side. There were 43,600 windows in the Twin Towers, equating to more than 600,000 square feet of glass.
American Airlines flight 11 and United Airlines flight 175 were flown into the World Trade Center's north and south towers, respectively, and American Airlines flight 77 hit the Pentagon. United Airlines flight 93 crashed in a field near Shanksville, Pennsylvania, after passengers attempted to overpower the hijackers.
The final survivor, Port Authority secretary Genelle Guzman-McMillan, was rescued 27 hours after the collapse of the North Tower. Some firefighters and civilians who survived made cell phone calls from voids beneath the rubble, though the amount of debris made it difficult for rescue workers to get to them.
The property damage alone cost about $100 billion, and estimates of the total economic damage inflicted by the attack range up to $2 trillion. The cost of the two wars in Afghanistan and Iraq that flowed out of the 9/11 tragedy has been estimated recently by Brown University scholars at about $4 trillion.
About Flight 93The passengers fought the four hijackers and attempted to break through to the cockpit. Despite the heroic efforts of these passengers, the plane crashed in a rural field near Shanksville in western Pennsylvania at 10:10 AM. All 40 crew members and passengers died that morning.
In 2010, buried underneath the ruins of the Twin Towers, we found the remains of a large ship's hull. Now, scientists have revealed the secrets behind this mysterious vessel. The ship was discovered in the wreckage below the excavation site, approximately 22 feet (6.7 meters) below the soil.
On Sept. 11, 2001, 343 firefighters and paramedics were killed, most when the towers collapsed. Now, an equal number have died from 9/11-related illnesses, the FDNY says.