In March 2010, President Obama signed the Patient Protection and Affordable Care Act, sometimes called “Obamacare,” as congressional leaders and others look on. At the signing were Marcelas Owens (left), whose mother died after she lost her job and her health insurance, and former Michigan congressman John Dingell (right, seated), who first introduced national health insurance in the 1940s. The Supreme Court upheld the controversial measure in June 2012. AP/Wide World Photos