what's the value of this? we know the federal authorities knew something was targeted in garland. >> they were able to communicate quickly and effectively with law enforcement who are on the scene and able to prepare an appropriate response. so in that instance, the right information got to the right people at the right time and staved off a potentially more impactful and catastrophic event. there are thousands potentially of elton simpsons, also saying there are investigations or people they're following in 50 states. how difficult is it to monitor all of these? >> i think there's a key difference between the people who are providing more passive support or kind of retweeting links or images or links or other things and other individuals who might be more inclined to become active. that's still an exceptionally small slice even though there's quite a few followers and who