Protests in the capital escalated Tuesday and Wednesday with calls for the prime minister and Central Bank head to resign.
Terrorists have not succeeded in striking on US soil since 9/11. But some say the US focus was too much on a military response, regime change, and a 'with us or against us' mentality.
City officials fear Pakistan's commercial capital could be paralyzed if militants become more unified.
With Cheney's urging, he insisted that he had that right under the US Constitution, especially during wartime.
The US pursuit of Al Qaeda with airstrikes complicates Pakistan's struggle against the Taliban, who launched their largest attack in months over the weekend.
The Sunni insurgent group may strike back, but Iraq experts say it's unlikely they will ever achieve the level of power they once wielded.