It is a historic day in Pakistan. Right now - voters are casting their ballots in the first ever election that would see power handed over from one civilian government to another. But there's been more of the violence we've seen in the run-up to the polls, with bomb attacks in Karachi and Peshawar. At least 11 people are dead. Al Jazeera's Imran Khan has more from the scene of the explosion in Karachi.
