Huge fire burns Fremont metal plant, prompts chemical concerns

A firefighter briefly goes without his helmet as he prepares to put on a mask while hosing down a building on fire Tuesday, Sept. 30, 2014, in Seattle's Fremont neighborhood. No injuries were reported in the fire, which sent flames bursting through the roof of the building and created a large plume of smoke visible from downtown. (AP Photo/Elaine Thompson)