Famed British street artist Banksy arrived in Chelsea on the third week of his New York City ‘residency,’ presenting a two panel collaboration with Brazilian brothers Os Gemeos inspired by the Occupy movement. Featuring a grid of riot police joined by one person in a headscarf and a grid of masked or scarf-wearing people joined by one policeperson, it’s a straightforward juxtaposition that asks who is battling whom. The crowd loved it.