"CPS: Mouse Droppings Found in Nachos, 2 Students Sickened." Chicago Tribune. N.p., 12 Oct. 2012. Web. 02 Nov. 2012. <http://articles.chicagotribune.com/2012-10-12/news/chi-2-cps-ill-after-eating-contaminated-lunches-20121012_1_mouse-droppings-nachos-cold-lunches>.