Josef Oehman's lengthy, detailed explanation of the Fukushima nuclear situation might have stood as a valuable reference work ... if it weren't for the fact that his conclusion turned out to be totally wrong. The MIT researcher took the news media to task for being alarmist and said there would "not be any significant release of radioactivity." That's the part that was wrong, as we now know. Since then, Oehman's essay has been significantly re-edited and reposted by others at MIT. Oehman has also been taken to task because his specialty is not nuclear engineering, but "risk management in the value chain." Now much is being made over Oehman's viral essay and how it was debunked. But when you get right down to it, the episode isn't much different from the guessing and second-guessing you see all the time in today's hopped-up media maelstrom.