The Military Times reports an open-air “burn pit” at the largest US base in Iraq may have exposed tens of thousands of troops, contractors and Iraqis to cancer-causing dioxins, poisons such as arsenic and carbon monoxide, and hazardous medical waste. The paper reports the military is burning 147 tons of waste per day in the burn pit at the Joint Base Balad, the central logistics hub for US forces in Iraq. According to a military memo, the burn pit has consumed Styrofoam, unexploded ordnance, petroleum products, plastics, rubber, dining facility trash, paint and solvents, and medical waste, including amputated limbs.