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What better way to celebrate the international day of workers everywhere, May Day, than a salute to a radical marching band?

The Rude Mechanical Orchestra has been a mainstay at New York City demonstrations and protests for years. Nothing perks up a boring demo line-up of speakers like the 30-piece RMO marching band, playing faves such as The Smash-A-Bank Polka or The Internationale. Here is a special Occupy Wall Street rousing rendition of Which Side Are You On. Click on the grey triangle to hear it: