Occupy Oakland demonstrators sit on top of a trailer truck outside the Port of Oakland during the Occupy movements' attempts to shut down West Coast ports in Oakland, California on Monday, December 12, 2011. OWS activists trying to shut down West Coast ports on Monday managed to close several terminals and encountered forceful responses from police, but fell short of mounting the full-scale cargo blockade they planned. Below, an Occupy Oakland demonstrator wears a tent and an "Anonymous" mask during the action. (REUTERS/Stephen Lam)