Hi, Yassin -
Thanks for feeding my internet addiction!
This isn't bad. I don't want to line edit the whole essay, but here's one thing you should fix: The phrase "control nuclear attack by United States of America" might confuse readers. In English construction, this means other nations set up the internet to stop the U.S. from attacking them.
While that makes sense and probably would have been a good idea at the time, your next sentence about the U.S. setting up an agency suggests that you meant to say that the U.S. used the internet to deal with attacks by others.
[I edit copy and have tutored college writing.]