Chemical tank ruptures at US state mill

A massive chemical tank holding nearly a million gallons of a corrosive liquid imploded and collapsed Tuesday at a Washington paper mill, killing at least one worker and leaving nine others unaccounted for, authorities said.

Nine other people were injured in the spill, some severely.

Emergency responders were still working on recovery efforts at Nippon Dynawave Packaging Co. in Longview, but hours after the implosion, some liquid remained in the collapsed tank, complicating efforts to reach vict ...