By PLS
I forgot to add a bit of obvious advice to those who are supposedly (but not necessarily in all seriousness) trying to find out exactly who was behind the suicide bombs in Karachi. Start by compiling a list of whoever, high or low, has access to the controls for street lighting in Karachi and another list of those who actually entered the building (or other critical premises) at the crucial time. Work from there. Follow the network of personal connection from the little guy who probably pulled the plug to the bigger guys who gave the orders, etc.
All this would be kindergarten stuff to any serious investigator, but since there are probably those in the chain of command who are not interested in pointing fingers at the culpable, it's worth the charge of simplisticism to lay it out here.
Prosecutable results aren't guaranteed, of course, but the resulting info might be interesting, not only for the outside chance of actually pinpointing who's to blame, but in devising procedures to prevent such sabotage in the future.
Assuming such prevention is wanted! I'm sure I'm not the only one who wonders if the investigation now under way will be anything but cursory. It's not only the Islamists who might want Benezir Bhutto out of the way. As the leader of a major political party and a possible rallying point for all the centrist secular forces whose desire for change was clearly manifest during the demonstrations protesting the frivolous removal of an independent-minded Chief Justice, she is also an obstacle to continued military rule, whether by Musharraf or any ambitious officer who wants to supplant him, now that he is vulnerable. What I'm suggesting here is pretty cynical: get her back and get rid of her.
I don't wholly admire Benazir, but I think she's pretty gutsy.