As the search for survivors in a fatal grain elevator explosion approached its fifth day, rescuers faced possibly their toughest decision yet: whether to call off the search.

Only one worker at the DeBruce Grain elevator remained unaccounted for early Friday - an oiler whose job may have taken him away from the area where three other bodies were found."The basic question comes back: Are you putting people's lives in jeopardy to recover a body?" said Curtis Wilson, Sedgwick County deputy division fire chief.

Rescuers on Thursday drilled a third entry point in the concrete roof of a 1,200-foot tunnel where they believed the missing man to be. But Friday morning, they went back to the original openings and were looking in a new area.