A hamburger is made from ground beef containing a filler the meat industry calls "lean, finely textured beef" but critics label "pink slime." A growing number of grocery chains, including Kroger, Giant and Safeway, are offering meat without the additive. (Associated Press)
** FILE ** This Jan. 12, 2012, photo shows people waiting in line at a job fair employer hiring event for Safeway in Portland, Ore. (AP Photo/Rick Bowmer)
David Morgan (center), 58, of Oregon City, Ore., waits with other job applicants to talk with recruiters during a Safeway Job Fair in Portland, Ore., on Thursday, Jan. 12, 2012. (AP Photo/Rick Bowmer)
People gaze at a small memorial plaque on a rock at a Safeway supermarket on Saturday, Jan. 7, 2012, that commemorates the victims of the mass shooting on Jan. 8, 2011, in Tucson, Ariz. (AP Photo/Arizona Daily Star, Rick Wiley)