Benazir was an author of her undoing in that she was overconfident in the security measures she thought was intrusion proof...just think about this...what was a need for her to use un protected provision of sunroof in a bullet and blast proof car?? It is like keeping windows and doors of the house open and then crying thief thief when the house is burgled?? If the adversary could not get her in close quarters, a desperate sniper would have got her down any way....any way, the election thing was a risky business. The shooter could be anyone...from ISI, Pak military special force, anti Bhutto faction or a splinter extremist group. Remember, Mush is a master strategist and has himself staged assassination attempts against himself to garner international monetary support against extremist to propel his personal agenda and popularity...it is always more than it can meet eyes!