<p>Tony Caldero stretches during a UPS driver meeting before he begins his delivery route Tuesday. With bad knees and backs a common problem with his coworkers, Caldero tries to minimize work-related injuries through stretching and proper lifting techniques.</p>
February 6, 2011
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February 6, 2011 8 p.m.
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Tony Caldero’s layers of brown were ready for the 10-degree chill outside as he rushed to sort the packages in his truck.