NTSB blames 'deep' systemic failures for deadly midair collision near Washington D.C. - NPR

NTSB blames 'deep' systemic failures for deadly midair collision near Washington D.C.  NPRFAA ignored warnings before DCA crash, federal investigators say  The Washington PostClose helicopter routes and Army crew’s perception of the wrong aircraft determine why a regional jet and helicopter collided  CNNInvestigators say deadly midair collision near Washington DC followed years of ignored traffic warnings  The Guardian‘This was preventable&rsqu