911 Memorial

The national September 11 memorial and museum is the principal memorial museum remembering the attacks that happened in the year 2001 which killed nearly 3,000 people, and the center bombing killed 6 people. The world trade center site is located where the twin towers were at. Many people thought that President George W. Bush may have deliberately allowed the attacks to happen. It was a tragic and dramatic day. Everyone was in shock they had family members in the buildings. The airplane impact with damage to the columns, the ensuing fire with loss of steel strength and distortion, and they collapsed which general occurred inward without significant tipping. Flames and debris exploded from the world trade center south tower immediately after the airplanes impact. The black smoke indicates a fuel rich fire. As the heat of the fire intensified the joints on the most severely burned floors gave away causing the perimeter wall columns to bow outward and the floors above them to fall The buildings collapsed within 10 seconds, hitting bottom with an estimated speed of 200km/h. Two high jacked Boeing 767s hit the world trade center, damaging the upper floors of both towers. It is estimated each 200 ton jet was traveling at least 200 miles per hour and carrying 60,000 pounds of jet fuel. It caused an explosion because of the jet fuel with flames as hot as 2000 degrees Fahrenheit. The concrete from each floor was 4 inches thick and the columns made were made of 100% steel. The intense heat weakened the steel and trusses so it expanded the concrete floor. The steel trusses began to sag so eventually the concrete slabs collapsed. The south tower collapsed first it was 2-7 stories high, the north tower collapsed shortly after the south tower collapsed. The planes hit almost the top of the towers and that’s why it slowly began to collapse.  

Reflection: What I think about the 9/11 is that it must be a tragic happening to the people that had a family member in there and suffered for that happening. Everything must have been out of control and so many people watching it in front of being eyes traumatized I feel so bad and sorry for they’re loss