Are the events depicted in Die Hard 4 actually possible?!

Are the events depicted in Die Hard 4 actually possible?

2 weeks ago
the core events - the shut down of country wide services through hacking?

Maybe, But I wouldn't count on that ever happening due to the fact that it was just a movie and an awsome one might I add,but most of it was fake,nevertheless it is a possibility that is very small by the way.So I would say that it could very well be possible and then again it wouldn't be possible at all, I really don't know.