In the 31 years since the first cases of AIDS were discovered in the United States, science has advanced so far that infected people -- who once faced a death sentence -- can live to near their normal life expectancy. Proper treatment not only can keep them healthy but also can make them virtually non-contagious. That finding, in a study last year, means that AIDS can someday be eradicated if everyone infected with HIV gets treated. But that's the tough part. The greatest obstacle is an abysmal health care delivery system (USA Today, 7/25).