Jun 25, 2011 · XB - 70 Crash Just after the last shot of the day was taken, a Lockheed/NASA F-104N, flown by NASA chief test pilot Joseph Walker, was sucked into the jet vortex of the giant XB-70 Daily Times Obituary Mercersburg Journal, 2 Jan 1914 in Downingtown, PA ; in PA MICU463 arrived on location confirming Chester County Fire Radio's. English: Middle English plat, platte ‘flat surface’ (Anglo-Norman French plat, plast), often with the senses ‘footbridge’ or ‘plot of land’.The name may be topographic, for one who lived near such a feature, or habitational, from a place so named, such as Platt in Manchester or Platt Bridge in Wigan (both Lancashire).