Washington paper mill chemical tank implodes, killing at least 1 and leaving 9 missing

At least one person was killed and nine others were unaccounted for Tuesday after a tank containing a corrosive chemical mixture ruptured and collapsed at a Washington paper mill, authorities said.

Nine people were injured in the collapse at Nippon Dynawave Packaging Co. in Longview, including one firefighter, officials said. Injuries ranged from minor to critical.

Officials said the response had shifted from rescue operations to recovery efforts.

"At the moment we are not aware...