The U.S. military recently captured an ISIS operative. The operative leaked plans about ISIS biological weapons. Isis engineers developed artillery shells with a powdered mustard gas. Victims in Syria have already shown gas burns. Chemical weapons are indiscriminate and difficult to defend without specialized gear. This latest development reminds world powers of the pressing threat Isis poses. The american military continues to fight Isis with airstrikes in Iraq and Syria. But should more be done in light of this new biological threat?