'FAA Prepares Aircraft-Technology Mandate After D.C. Midair Crash; FAA Mandate Under Discussion Would Require Nearly All Aircraft In Civilia

'FAA Prepares Aircraft-Technology Mandate After D.C. Midair Crash; FAA Mandate Under Discussion Would Require Nearly All Aircraft In Civilian Airspace To Use ADS-B Systems; Administrator Bryan Bedford Has Tasked Staffers To Draft Measure While Safety Legislation Has Stalled In Congress' - WSJ Exclusive