On a historic New York anniversary—two years since Occupy Wall Street’s takeover of Zuccotti Park—unions and activist groups marched through the city demanding the Robin Hood Tax, a ½-percent tax on Wall Street financial transactions which could generate up to $350 billion annually. Those dollars, the National Nurses Union (NNU) and partner groups say, should be used for housing, health care, infrastructure, fighting AIDS, and addressing climate change. They chanted, “Want to end this deficit? End the war, tax the rich.”