Estimates of the number of people at this rally in Karachi for Pakistan cricketer-turned-politician Imran Khan vary wildly.
But even the lowest figure of at least 100, 000 makes this one of the largest political rallies Karachi has seen in recent years.
Khan's promising to tackle Pakistan's endemic corruption if he becomes prime minister.
SOUNDBITE: Imran Khan saying (Urdu):
"I assure you that you don't need a rocket scientist here in Pakistan. We just have to correct the system. We have to bring in an honest team that is accountable to itself."
The rally's come at a time of tension between Pakistan's civilian government and the military it's accused of plotting a coup after the U.S. raid that killed Osama bin Laden.
Polls suggest Khan is Pakistan's most popular politician.
But popularity doesn't necessarily translate into power.
Most of Pakistan's voters live in rural areas where feudal relationships determine generations of political loyalty.
Paul Chapman, Reuters
