We had a black man kill a dozen, mostly white workers at the Washington Navy Yard in 2013, but that was then quickly explained away and consigned to the memory hole. It didn't advance the Leftist narrative.
That whole thing still stinks....that with stories of missing nukes, Nuclear control generals sacked and Lindsay Graham’s enigmatically voiced fears of a terrorist plot to explode nukes in Charleston Harbor(at the same time a Richter scale 6 Earth quake had recently occurred off the coast with Russian publications stating it was stolen nukes that Obama had wanted to use in a false flag operation but certain generals balked). It all stinks as is NATO’s deliberately tweaking the Russians!