Samizdata says that The New Scientist to decided to drop a little editorialization into their reporting on the NK nuke blasts. Unfortunately, they flubbed:

While reading the October 14th issue of New Scientist I came across the following statement in an article titled "Nuke test sends shock waves round the world":

It may even have been only half a kiloton - the same explosive power as the terrorist bomb in Oklahoma City in 1995

[...] A half kiloton is 500 tons or 1,000,000 pounds of TNT. Now TNT is a 'high explosive', and the Oklahoma City bomb (and those of which I am quite familiar with from Belfast many years ago) are almost always made from nitrate fertilizer. While rather potent, they pack perhaps a fraction of the power per pound of a high explosive. So let us be conservative and give it a factor of two.

The quoted statement is therefor claiming a small truck pulled in front of the Murrah building loaded with about two million pounds of fertilizer.

How on Earth did the editors of a well known science magazine miss a hooter of this magnitude?