U.S. troops test gas masks in France. Twelve U.S.

U.S. troops test gas masks in France. Twelve U.S. soldiers, fighting in France, are seated in an enclosed two-and-a-half ton truck where a small amount of tear gas is set off to test their gas masks. The VI Corps Chemical Warfare Section of the U.S. Army developed the mobile outfit which unables many fighting units to check their masks in one day.