People wait for tickets to attend the last day of arguments over the Affordable Care Act at the Supreme Court. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images

Members of the public line up Monday morning as the Supreme Court begins three days of arguments on the health care overhaul law signed by President Obama in Washington. Charles Dharapak/AP hide caption

itoggle caption Charles Dharapak/AP

Young-min Kwon of Massachusetts General Hospital holds the metal-alloy ball of Susy Mansfield's faulty artificial hip joint. The yellowish tissue on top is dead muscle caused by a reaction to the metal debris produced by the defective hip implant. Richard Knox/NPR hide caption

itoggle caption Richard Knox/NPR