Good article, right down the line.
I believe Catholic moral theologians need to return to the issue of torture, which seemed to be outlawed entirely by some recent documents. But I don't think that reading is entirely certain.
Just war is now fairly widely recognized as an area that needs renewed consideration, after having been shoved under the rug by Catholic theologians. If you hypocritically insist that no war is just, then you end up saying, "Well, sometimes you have to do what's necessary, and you find yourself deliberately breaking the law with no rules to serve as guidelines.
Similarly, capital punishment has been under debate. I incline to the belief that Pope John Paul II was personally opposed to capital punishment, but that he did not entirely rule it out.
The same with torture. It's not something that should ordinarily be indulged in, but I think Krauthammer indicates the situations where it should, properly be used.
Just war theorists point out that you have a duty, in Christian charity, to defend yourself, your family, your neighbors, your country, against unjust threats or attacks. Not to do so is a failure of charity.
Probably the same applies to torture. To sit back and let a bomb go off, killing innocent people, because you refuse to torture the evil person who could give you the information to defuse the threat is, basically, a failure of charity.