Cross-tracking of this sort has not previously been feasible or legal, but firms such as Syntek Technologies, Mr Poindexter's most recent employer, have devised the necessary software, and the Homeland Security Act signed last month began the process of lowering the legal barriers.
According to a report from the Verge, Microsoft is developing a cross-application exercise-tracking app paired with a heart-rate monitor for the Kinect.
The discussion established that while the B-2 may occasionally be detected by some radars, its stealth technology reduces the radar cross-section of the B-2 to the point where radar tracking of the requisite continuity and accuracy is impossible.