This entry, Assassination of Benazir Bhutto, has a complete timeline of the events and their fallout.
It is yet unclear who is responsible for the attack. Some reports say that it was Al-Qaeda, others say that Taliban supported warlords are responsible.
This article gives the international reaction to the assassination and is titled this way.
The Red Mosque incident led to the Taliban supported rebels to scrap a peace deal with the government and continue the War in Waziristan. Which would be the reason why the warlords tried to assassinate her on the 18th of October 2007. More on the Karachi bombings.
Most interesting are the charges of corruption against Bhutto and her husband by different countries. Power corrupts, and absolute power corrupts absolutely? Then again, this doesn’t justify the assassination. It is an attack on democracy, even if Bhutto was corrupt.