Workers use grinders to smooth down the welded joints for railroad suspension parts at the Columbus Castings foundry in Columbus, Ohio, on April 25.
Source: Photograph by Ty Wright/Bloomberg
Workers use grinders to smooth down the welded joints for railroad suspension parts at the Columbus Castings foundry in Columbus, Ohio, on April 25.
Source: Photograph by Ty Wright/Bloomberg%7Cutmccn%3D(direct)%7Cutmcmd%3D(none);&utmn=350660339&utmp=%2Fphoto%2F2012-05-04%2Fbloomberg-pictures-of-the-week&utmhn=10.248.179.17&utmac=UA-11413116-12&utmhid=794614733)