I wouldn't be so sure that NORAD doesn't use their "most advanced" sensor platforms. How would they be able to determine whether or not the threat was "real" b

I wouldn't be so sure that NORAD doesn't use their "most advanced" sensor platforms. How would they be able to determine whether or not the threat was "real" before turning on their sensors? Are you suggesting that they have two tiers of sensor networks, and hold the "good" ones back for "real" threats?