1997 – Phoenix Lights incident A widely reported appearance(s) of black triangles involved the "Phoenix Lights" events, during which multiple unidentified objects were observed near Phoenix, Arizona and videotaped by both the local media and residents beginning on Thursday, March 13, 1997. Some of the observed objects/lights appeared to be grouped in a large "V" formation that lingered for several minutes. Some residents reported one of the black triangles to be over a mile wide, and that it drifted slowly over their houses blocking out the stars of the night sky. An official report from the US Air Force concluded that the military had been locally testing aircraft-launched flares during that time period.
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