CNN Anderson Cooper 360 March 18, 2015 03:27:00
Guess which was yesterday, an envelope was received at the white house, there was a mail screening facility which was something that's been set up just for these types of situations. this was many, many years ago, but it is to screen mail coming into the white house for just these sorts of situations. accords to the u.s. secret service they did an initial biological testing on the nfl. envelope. but earlier today they did testing on this envelope and returned what they're calling a presumptive positive for cyanide. then that sample was transported to another facility to confirm the results. an...