Forces Practice Chemical Warfare Defense

FORT LEONARD WOOD, MO - APRIL 19: U.S. Army soldiers participate in MOPP gear exchange, their final mission of the day, in which they remove all their MOPP gear except protective mask and dress in fresh gear during training April 19, 2003 at Fort Leonard Wood?s Chemical School in Fort Leonard Wood, Missouri. Soldiers from all branches of the Armed Forces, civilian first responders, and some foreign military attend the chemical school for training in various types of chemical detection and survival through several courses including practice in a hot zone where actual toxic agents such as the Sarin and VX nerve agents. (Photo by Brendan Smialowski/Getty Images)