Go read the NYT article. It is a very good piece of writing that discloses the testimony of numerous soldiers chemically exposed while trying to decommission some of those WMD's. Most of what was found was mustard gas but some was Sarin or VX gas. Many of the dual-mix chemicals in the canisters were leaking or simply sloshing around when picked up and carried.
Barack Hussein Ebola withdrew our troops, including all those discovery and cleanup troops. As a consequence, ISIS now controls that territory. Their liege-lord, the daimon known as Allah, is now controlling these warheads. Allahu Akbar. One Oath to rule them all, One Oath to find them, One Oath to join them all and in the darkness bind them