How investigators figure out what chemical weapons are used — and who used them

This week, the French government released a scathing report on the deadly sarin attack in Syria. The assault bears “the signature” of President Bashar al-Assad’s chemical weapons program, researchers found. It's confirmation of something the international community long suspected — that the Syrian government was behind the attack on Khan Sheikhoun, in the northern province of Idlib, Syria, which […]

Source: http://www.washingtonpost.com/blogs/worldviews/wp/2017/04/27/how-investigators-figure-out-what-chemical-weapons-are-used-and-who-used-them/