A dental technician takes a x-ray on a patient during for a free medical clinic organized by non-profit group Remote Area Medical at O.Co Coliseum in Oakland, California March 24, 2012. The four day free medical, dental, and optical clinic attracted thousands of attendees, often without insurance and unemployed, as well as hundreds of volunteer medical professionals. REUTERS/Stephen Lam (UNITED STATES - Tags: HEALTH SOCIETY POVERTY)