in 2003, but that again, was an aborted plot, the high command of al qaeda that said they weren t going to go through with that, but al qaeda was developing these kind of poison gas techniques in various camps in afghanistan before 9/11. the concern has been that isis, with all of their resources have also been doing research and development into chemical weapons into poison gas, and they want to get some sort of chemical component through in an attack against the west because they think that will cause panic and propel them back into the global headlines. i can tell you that officials on both sides of the atlantic very worried that we could see a poison gas attack on the streets of the western capital within the next couple of years. paul cruickshank, renee marsh, appreciate the detail sglo. breaking news on the russian investigation and what the fbi was doing to stop it. we ll be right back.