THESE ARE THE FUNDAMENTAL QUESTIONS ABOUT CW PRODUCTS NOW !

What is the difference between the chemical byproducts present in homemade versus military grade sarin and what materials should be examined in order to identify the type of sarin used? Is it difficult to find the byproducts? Can they disappear after a certain amount of time? What are the challenges that the UN inspection team, in probing the recent Ghouta attack and other incidents, is likely to encounter? Can any group (Syrian regime or other armed forces on the ground) be blamed for the crimes that have been reportedly committed before conclusive evidence is provided?