"this war can stop when you want it to, "you just need to lay down your arms, surrender, "give in to all our demands and forget about being a part "of western europe." frank gardner, bbc news. gregory koblentz is director of the biodefense graduate program at george mason university. in the past, he has briefed the un security council about weapons of mass destruction. in your assessment, what is the arsenal of chemical biological weapons available to president putin if he decides to use them? , , . them? russia inherited the remains of _ them? russia inherited the remains of the _ them? russia inherited the remains of the soviet, - them? russia inherited the i remains of the soviet, former soviet chemical biological weapons, which was massive. russia claims it destroyed their weapons facilities from those programmes but the reality is we don't know what they held onto. the one thing we do know is that they have the novichok nerve agent,