The top section of the building tilted to the east and to the south and began its descent. The time from aircraft impact to collapse initiation was largely determined by the time for the fires to weaken the perimeter columns and floor assemblies on the east and the south sides of the building. World Trade Center 2 collapsed more quickly than World Trade Center 1 because there was more aircraft damage to the building core, including one of the heavily loaded corner columns, and there were early and persistent fires on the east side of the building, where the aircraft had extensively dislodged insulation from the structural steel. The World Trade Center towers likely would not have collapsed under the combined effects of aircraft impact damage and the extensive, multi-floor fires that were encountered on September11, 2001, if the thermal insulation had not been widely dislodged or
Days later, when the shuttle attempted reentry, the breach allowed heat into the wing, which caused destruction of the craft. All the astronauts aboard the Columbia were killed. What were the lessons that NASA failed to learn between the two shuttle disasters? What changes that NASA implemented after the Challenger
More than 90% of the workers and visitors who died in the towers had been at or above the point where the plane was hit. In the North Tower 1,355 people at or above the point where the plane hit were trapped and died of smoke inhalation, fell or jumped from the tower to escape the smoke and flames, or were killed in the building's eventual collapse. The destruction of all three staircases in the tower when Flight 11 hit made it impossible for
Finally, the fourth plane crashed into a field in the rural area of Pennsylvania around 10:03 A.M. (911 timeline). After all these terrorists attacks on the United States this country was affected in so many ways. The effects of September 11, 2001, now known today as 9/11, were the loss of lives, the economic consequences and the security at the airports. The loss of innocent lives during 9/11 was
As Columbia Space Shuttle launched, foam insulation came off and damage left wing’s thermal protection system. The heat of reentry destroyed the left wing and lead to the breakup of the orbiter. Challenger and Columbia Space Shuttle accidents are examples of human error and negligence. The Challenger suffered from negligence with no room to blame human imperfections. Engineers wanted to delay Challenger’s take-off; because warmer temperatures produce better launch probability.
Space Shuttle Columbia Disaster The Space Shuttle Columbia disaster happened on February 1st, 2003, which broke on the way back to the Earth. All the astronauts, including two women died in this disaster. The reason why this disaster happened was a piece of foam insulation broke off from the Space Shuttle external tank which damaged the left wing of the shuttle. Even though some engineers of NASA had doubted that the left wing of shuttle had been damaged, the administration staffs restricted to do advanced research. The engineers of NASA found that the foam shedding and debris strikes could not be avoided and solved, even though the previous design of space shuttle required that the external tank was not to shed foam or other debris.
From 1939 to 1945 a global war broke out, killing millions of people. At the time no one could end it. No person could, but a massive bombing of one area could. The atomic bomb was the bomb to end World War II, during the bombing of Hiroshima and Nagasaki. No other bomb had the strength of the atomic bomb, and it was quoted as “the most powerful and terrible weapon” (“The Atom Bomb – the development of the atomic bomb, the uses of the atomic bomb”).
After a few minutes of watching the same clip, I suddenly saw another plane crashing into the twin of the other building. I couldn’t believe it, I looked at my family and all you could see was the sorrow and angst in their faces as they sat with there mouths dropped open. As the cameras zoomed in on the masses of people covered with a grey ash, you could see in the background smoke swarming the air and then the first tower went tumbling down. That’s when it really hit me that our country was under attack. Since I was so young I didn’t really know that there were more planes than the two that had hit the Trade Center.
It is well known that atomic detonations on or above a sandy desert will melt the silicon in the sand and turn the surface of the Earth into a sheet of glass. But if sheets of ancient desert glass can be found in various parts of the world, does it mean that atomic wars were fought in the ancient past or,
Devastation, destruction, terror, and straight up fear, is what people would’ve seen if they visited Nagasaki or Hiroshima after the atomic bomb was dropped on those cities. The number of scientists who were involved in the development of the atomic bomb is unbelievable. The bombs were very unique objects, whether it was the size of the bomb, or even the amount of explosives inside. The names of the atomic bombs will forever be remembered for the chaos they brought to Japan. The decision to drop the bombs was one of the most difficult things President Truman had to do during his Presidency.