MEDFORD, Mass. — Massachusetts Bay Transportation Authority’s (MBTA) 57 repairers, sheet-metal workers, carpenters and engineers work with a mix of old, new, and jury-rigged technology, replacing components with scrapped parts salvaged from retired Blue Line cars, and protecting traction motors from snowdrifts with hairnets, due to the agency’s financial crisis, Boston.com reported. For the full story, click here.