用英语表达你所知道的有关9.11事件

I would like to describe it as a man-made catastrophy.Thousands of lives fell down because of the terrorist attack.Enormous property which are worth billions of dollars were destroyed during the disaster. It is the stunning incidnt that reminds peoplearound the world that terrorism is such a fatal factor on the planet that it is time we take drastic actions to cope with it. It is a war every country is obliged to participate in.