Green Day Unveil New CD Artwork

Of 21st Century Breakdown's message, however, we can expect more of the same: working-class heroism, the struggles against corporate America, war etc. "It's about reflecting what's been happening the past three years and putting it to melody with some bold statements."

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One confirmed track, "March of the Dogs," is about "preying on people's blind faith."

"I'm all for spirituality. There's nothing more spiritual than rock and roll," said Armstrong.