Police arrest at least 20 demonstrators , CNN affiliate reports . Mall management warns organizers not to hold the event on its private property . Hundreds chant , throw up their arms and sit down to the dead . Mall of America claims it 's the nation 's largest .
Police arrest at least 20 demonstrators , CNN affiliate reports . Mall management asks organizers not to hold the protests on its private property . Hundreds chant , hold up their hands and lie down to play dead . Mall of America says it 's the nation 's largest .