dr. sebastian corker, counter terrorism expert and the author of defeating jihadi. good morning. if you've been listening to sky news he heard them speaking about what regular people could do to spot attacks like this in what authorities could have, should have done to prevent them. your thoughts. >> yes, it is interesting they are showing clips from the british professional. i grew up in the u.k. in the 70s and 80s are the most violent era of the irish republican army. it is absolutely true at the front lines in this lines in these kinds of campaigns is the average citizen. when i was a child of somebody left in unattended bag on a bus or metro car, within seconds somebody would say who is said and if you got no reply, the vehicle would be stopped, evacuated and authorities would be called. that's the level of tactical awareness we have to have today in the face of global jihads. to restore shoot from the head. they plan to mr. vail, collect intelligence. as a result, we can offer the people who spot is jihadists as they plan an attack. in san bernardino we have reports of the n