country road near turkey s border with syria. he told us that until 2008, he was a chief of staff in the chemical weapons program. he said he worked on the defense side, in charge of preparing troops for dealing with attacks and safety equipment. what specific chemical weapons does the assad regime have? he said they have mustard gas, along with a highly toxic nerve agent, vx, sarin and tabun. the regime has started to fall and deteriorate, he argues. it s highly possible assad will start using chemical weapons to kill his own people. i think it s a last-ditch effort and one they don t want to use but are considering it. reporter: if the regime crumbles, the u.s. fears the weapons could be transferred to hezbollah or fall into groups like al qaeda. knowing what you do about the
those fears. driving along a dark back country road near turkey s border with syria. he told us that until 2008, he was a chief of staff in the chemical weapons program. he said he worked on the defense side, in charge of preparing troops for dealing with attacks and safety equipment. what specific chemical weapons does the assad regime have? he said they have mustard gas, along with a highly toxic nerve agent, vx, sarin and tabun. the regime has started to fall and deteriorate, he argues. it s highly possible assad will start using chemical weapons to kill his own people. i think it s a last-ditch effort and one they don t want to use but are considering it. reporter: if the regime crumbles, the u.s. fears the weapons could be transferred to hezbollah or fall into groups like al qaeda. knowing what you do about the facilities, the security, do you worry that these weapons will fall into the wrong hands? yes, he said.