When Germany unleashed chlorine gas at Ypres in 1915, it marked the dawn of modern chemical warfare. Soldiers had no masks, ...
Trails in Grand Canyon National Park were closed due to a chlorine gas leak. Chlorine is used as a disinfectant in the Roaring Springs area of the park. The trails have since reopened NORTH RIM ...
GRAND CANYON VILLAGE, Ariz. — All inner canyon trails at the Grand Canyon reopened after a chlorine gas leak at Roaring Springs, the national park said on Thursday afternoon. The chlorine gas ...