OAXACA CITY, Mexico — They were lined up by sunrise, many ill, some blind, some nearly deaf. The hopeful steadied themselves on canes, clutched family or shifted their feet. The array of ailments and concerns of the Oaxaca state residents weren't the result of a natural disaster but par for life in rural Mexico. A balanced meal is a luxury. Tap water is nasty. Good medical care is as rare as a well-paying job. News that Los Quijotes, a group of San Antonio doctors, nurses and support staff, were here to treat the needy seemed too good to be true...