The tragedy? It has happened before. It has happened since.
The reality? Killing each other remains in mankind's tool box.
If you doubt that, just turn on the news.
My own personal opinion ("my own personal"? Well, that's a little redundant).
I don't think we'll ever see an attack like this again (not that I saw this one in the first place). I just don't believe nations will send an entire fleet to attack the fleet of another nation. If nothing else, there is no way in the world that something like this could ever be carried out in secret.
But, do I think that surprise attacks will continue that will result in the death of thousands? Oh...yeah. I won't insult your intelligence with examples.
And, I will see those attacks.
That terrifies me.
My own personal opinion (Part II). Yeah, can't stop this redundancy thing.
I believe FDR knew the Japanese were going to attack. Not that Japan was full of choir boys, but the US pretty much kept poking them in the eye. I honestly feel the President wanted to get into the war and saw an answer in the Pacific.
Did he think Japan would kill thousands in a surprise attack? Of course not. Most people at the time thought an attack on maybe the Philippines was most likely, but not on the Pacific Fleet. But, if Hawaii were attacked ("PFFFT! Hawaii!?" they probably thought), how much damage could the little yellow man cause? Obviously, racism did not just appear in the 21st Century.
Hubris. It can be a killer.