For those of you who missed it, the Pentagon resumed above ground nuclear testing--sort of.
The test, called "Divine Strake," involved a 700-ton chemical explosive--the largest conventional explosive ever detonated at the Nevada nuclear test site. Initially, the Pentagon told the press the test was intended to help determine whether conventional weapons could be used as bunker busters.
But, as anti-nuclear activist Andrew Lichtman speculated, and the Pentagon later refused to confirm or deny, the test may in fact have been intended to simulate the effects of a low-yield nuclear weapon.
For others of you getting nervous right now, New Mexico journalist John Fleck, has done a good job compiling coverage of the event. Click the link and read on.