. >> pelley: walter laney's and threatens the other. the health wagon stabilized him and set him up with a >> hey, walter, this is dr. isaacs. >> walter laney: it's going pretty good. >> how have you're sugars been? >> laney: okay. they got my blood sugars back under control. before this year, i was in the hospital three, four times, and this year, i ain't been in none since i've been seeing them. if it hadn't a been for them, i don't think i'd be here today. >> pelley: outside the church where they we handing out food, we met dr. joe smiddy, a lung specialist who's the health wagon's volunteer medical director. >> joe smiddy: this is a third- world country of diabetes, hypertension, lung cancer, and c.o.p.d. >> pelley: dr. smiddy drives a second health wagon, a tractor- trailer x-ray lab. i guess they taught you something about radiology and all of that in medical school. did theyeyeach you how to drive an 18-wheeler? >> smiddy: i did have to go to tractor-trailer school. and it took a long time. >> pelley: was that harder than medical