Rachel Maddow explains the mechanics of what happens when a nuclear reactor has a meltdown, and about how experts are reading signs from the compromised Japanese nuclear reactors to understand how close they are to meltdown.
You are free to comment on this discussion in any way you feel is appropriate. If you choose to use to use any language which our editors feel is vulgar -- by their standards -- your comment may be tagged "Crude or Lewd" and may be filtered out of the discussion by those who prefer not to read that sort of thing. If you know you have entered something which will cause your comment to be tagged, we ask that you tag it yourself to save us the time. We do encourage everyone to be civil and not make rude attacks on other people in the Forum. We don't censor out those remarks, but few people enjoy reading them and we would like participation in our Forums to be a pleasant experience for everyone. And, by concentrating on what is said instead of who is saying it, even those who may disagree with you will be more likely to consider your opinions valid.