"As you watch the developments in Baghdad, it's important to understand that we will not be able to prevent every al Qaeda attack. When a terrorist is willing to kill himself to kill others, it's really hard to stop him. Yet, over time, the security operation in Baghdad is designed to shrink the areas where al Qaeda can operate, it's designed to bring out more intelligence about their presence, and designed to allow American and Iraqi forces to dismantle their network.We have a strategy to deal with al Qaeda in Iraq. But any time you say to a bunch of cold-blooded killers, success depends on no violence, all that does is hand them the opportunity to be successful. And it's hard. I know it's hard for the American people to turn on their TV screens and see the horrific violence. It speaks volumes about the American desire to protect lives of innocent people, America's deep concern about human rights and human dignity. It also speaks volumes about al Qaeda, that they're willing to take innocent life to achieve political objectives.The terrorists will continue to fight back. In other words, they understand what they're doing. And casualties are likely to stay high. Yet, day by day, block by block, we are steadfast in helping Iraqi leaders counter the terrorists, protect their people, and reclaim the capital. And if I didn't think it was necessary for the security of the country, I wouldn't put our kids in harm's way....Either we'll succeed, or we won't succeed. And the definition of success as I described is sectarian violence down. Success is not, no violence. There are parts of our own country that have got a certain level of violence to it. But success is a level of violence where the people feel comfortable about living their daily lives. And that's what we're trying to achieve."