And in other news, life on the moon. 0r, kind of in a moon of saturn. Possibly. But should we even be looking for Extra Terrestrials . Hello. Gbu as B Massive 0rd Nance air blast, or moab. Its a huge bomb. And it was dropped in afghanistan earlier today, aimed at the tunnels used by the Afghan Branch of so called Islamic State. The americans have never used a conventional weapon this powerful in combat, and given everything that has been happening in us foreign policy, it is no wonder that everybody is trying to work out what it means. Now, dont fall for some of the hyperbole its huge, but it would take more than a thousand of these to make one hiroshima. But does it tell us something about the willingness of the us military to flex its muscle in the world . Im joined by our diplomatic editor mark urban. As a bomb, is this a big threshold through which the world has passed today . Im not sure. The rafs grand slam that was dropped in world war ii was just slightly below this in size. Th