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

1. NTSB blames 'deep' systemic failures for deadly midair collision near Washington D.C.  NPR
2. Close helicopter routes and Army crew’s perception of the wrong aircraft determine why a regional jet and helicopter collided  CNN
3. FAA ignored warnings before DCA crash, federal investigators say  The Washington Post
4. Investigators say deadly midair collision near Washington DC followed years of ignored traffic warnings  The Guardian
5. ‘This was preventable’: NTSB scorches FAA over fatal DC air disaster  Politico