The reality was that his boss took the fall for him, which is awesome and terrible. Much of the discussion in this thread has been a tempest in a teapot due to missing context.
His supervisor took the fall to protect him, he was fired on paper, but it was his last day anyway, and he did actually get to work at the embassy again, as it really was a simple innocent mistake.
Though certainly one with serious, long-lasting consequences.
Edit: http://globis.jp/774-2
It seems that the translators could have saved their work more regularly -- perhaps they hold some of the blame. Obviously the poster could have thought a bit before hitting the button -- he holds all the blame for the resetting of all the terminals. How is Itoh "more responsible"?
Mr. Beck wasn't culpable because he didn't understand the full effects of his actions or the tension of the current situation. Ioth should not have let Beck in the door that morning and he should not have given that much power to the intern.