In this Monday, April 7, 2014 photo, a West Metro firefighter leads a student to a bus during an evacuation after students were exposed to hazardous skin irritants at Jefferson County Open School, in Lakewood, Colo. Seven students at the suburban Denver school were hospitalized and about two dozen others and a teachers' aide were decontaminated on site after complaining of skin and eye irritation. (AP Photo/The Denver Post, AAron Ontiveroz) MAGS OUT; TV OUT; INTERNET OUT; NO SALES; NEW YORK POST OUT; NEW YORK DAILY NEWS OUT