It's now back and with those early thoughts that I've read in other forums, they've said that it's all about the congress hearing and FB did it intentionally and it's not a coincidence that their servers were down. I don't know the whole thing since I don't reside in the US.
Thank God it's now back,I failed to notice it because through out that period,I was occupied with my other jobs that I couldn't come online.I did not even hear of it,but it was later that I was told that the internet's were not working,I tried opening immediately,and it opened,so I didn't notice it.
But personally I think that happens as a result of multiple users,and I also think that the person in control just wanted to prove to people that he is able to control it.
For that few period of time,people were frustrated because they couldn't have access to their online work.Thank God it now perfectly ok.