Bruce Willis has revealed the secret of his angry glare – thinking about the world's problems.

"I don't have to look too far to find that glare," he commented. "All I have to do is think about the world my daughters will inherit and I get that look in my eyes.

"I don't like the world. I don't think it is being run correctly and I think it could be done a lot better.

"The news is manipulated and managed and it is all meant to scare you," the actor continued. "They don't show you anything good. They don't show you anything good coming out of Iraq. All they say is: 'This many soldiers dead since Bush took office.'"