30 JULY 2011 - PHOENIX, AZ: SHILOH THOMPSON and others dance in a flash mob in Phoenix, AZ. About 200 people showed up at Heritage Square in downtown Phoenix Saturday morning for a flash mob coordinated by the Arizona Science Center. The mob danced to several hip-hop songs before disbanding. The event was a part of National Dance Day Activities and the First Lady's "Let's Move!" physical fitness campaign. PHOTO BY JACK KURTZ