criticism for not taking out the first object early on. certainly no one wants to see a repetition of that. i think those are the factors that drove the correct decision, by canadian prime minister, in consultation with our president, to take it out. >> admiral, we've now to object struck down over north american airspace and as many days. is this a new phenomenon or are we in the general public is becoming more aware of what is happening over our heads? >> it is the latter. it is a combination. it is not a light switch i was suddenly, poof, we understand for the first time that there are objects whizzing around up there. think of it more like a dial, like the light in your dining. room to kind of turn it off. getting a better sense of this. i think that is a good, thing and running alongside that, our advances in technology. nanotechnology, that makes everything smaller and easier and lighter.