Berlin knew the danger of flying over Ukraine before flight MH17 was downed, but didn't alert German airlines. The allegation is part of a joint investigation by three media outlets.
Murder In The Sky: Malaysia Airlines Flight MH17
Deutsche Welle: Berlin did not warn of Ukraine flight dangers before MH17 crash

Dutch and Malaysian investigators and local authorities work, on April 16, 2015 at the MH17 plane crash site near the village of Grabove in the self-proclaimed Donetsk People's Republic (DNR).