Rather than measuring the Doppler shift of the returning wave most radar guns use the phase shift ... in her quest to build a crude TSA body scanner.

AN/APS-20 radar scanner and servicing trolley for the Avro Shackleton A.E.W.2 reconnaissance aircraft WR 960 made by the Bogart Manufacturing Corporation, Brooklyn, New York.

But, a new sort of radar gun may have us quickly singing their praises. The Virginian-Pilot reports that there's a new tool that will be able to tell officers if a driver is texting rather than ...