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finally tonight, america strong. the retired air force mechanic fixing anyone s car for free. helping to repair more than just what s under the hood. here s steve osunsami. reporter: for 15 years now, david mccoy has been doing brake jobs, transmission repairs, replacing radiators and fan belts, for free. i get hugs and kisses. and it s just i get the best part of the deal, i think. reporter: it s his ministry, helping people who can t, with a lug wrench in one hand and an oil pan full of compassion in the other. people that oftentimes can t afford to put food on the table, but they need transportation to get to doctor s appointments, to work. but they can t afford the repairs on their cars. reporter: with the help of two methodist churches in powder springs, georgia, this retired air force mechanic who now works for delta airlines has turned this old barn into an auto repair shop.