So he means something like what a surge protector blocks? I suppose they could have neglected to put a fuse in the circuit which should have protected it again

So he means something like what a surge protector blocks? I suppose they could have neglected to put a fuse in the circuit which should have protected it against a surge that would damage some very expensive equipment (not to mention cause nuclear detonation.) But I don't know. I wasn't there to see and I didn't read the report. And we all know fuses fail as well - would that be the fourth out of five failsafes? To answer your question, no - I honestly would not feel safe. But "dramatically close" is different altogether. When I think "dramatically close" I think about the time my kid ran into the street and I grabbed him from in front of a car... I needed to act urgently to avoid disaster. I could be wrong though (and often am.)