Although combat operations unseated the Taliban and the Saddam Hussein regime, a poor understanding of the recent histories of the Afghan and Iraqi peoples undermined efforts to consolidate early battlefield gains into lasting security.

The key thing about force protection is... if you focus too much on force protection, and you disengage yourself from the community, you're putting yourself at greater risk because you need to interact with the community in a positive way to gain the intelligence you need.

You have to keep listening and thinking and being critical and self-critical. Remember General Nivelle, in the First World War, at Verdun? He said he had the solution and then destroyed the French Army until it mutinied.

There are two ways to fight the United States military: asymmetrically and stupid. Asymmetrically means you're going to try to avoid our strengths. In the 1991 Gulf War, it's like we called Saddam's army out into the schoolyard and beat up that army.

The only people that can make peace are the parties to the conflict, and just as they are responsible for the conflict and its consequences, so should they be given responsibility and recognition for the peace.

There are more than 300,000 families in the Gulf region that lost their homes and are waiting for peace of mind. The hurricane exposed the sad reality of poverty in America. We saw, in all its horrific detail, the vulnerabilities of living in inadequate housing and the heartbreak of losing one's home.

So war is an extremely sad business, because the majority of people don't want to be in it.

We also did something called the Texas Peace Festival, which was actually a better gig both musically, and in the way it was organised.