Two stories this morning should remind us that the terror threat is still, unfortunately, very real.In London, nine British citizens have pleaded guilty to terror-related charges connected to a plot to bomb the London Stock Exchange. And in Pakistan a university professor sent a package of anthrax to the prime minister’s office.The London plot was nipped in the bud, and nobody got sick from the anthrax, thankfully, so these stories are attracting much less attention than if these loons had succeeded. But they should remind us that the world remains full of danger and we can’t let our vigilance drop.The worst news from London isn’t that fanatical religious nutjobs still want to kill; it is that the guilty parties were British citizens. The vast, overwhelming majority of Muslims in Britain and the US are law abiding, respectable citizens who contribute to the health and well being of the greater society. But the bad apples exist, and precautions must be taken.The Pakistan incident should remind us that in the medium to long term, we may have more to fear from biology than from bombs. For now, fortunately, the effective use of biological weapons remains beyond the grasp of the bad guys, but that will likely change.Via Meadia thanks those whose vigilance and detective work keeps the dark forces at bay. Too often, when things are going well, we forget those whose dedication and attention protects us. Like the villagers of Bree, we have nothing but scorn for the rangers whose work keeps us safe. But we need those rangers and the difficult, sometimes dangerous work that they do.