UFO Sighting in Dallas, Texas on 2018-02-17 18:13:00 – Looked up saw a black object near airport. never moved, then disappeared

Was on security detail, looked up and saw a black boomerang shaped object near dfw airport. very high altitude but under jets leaving contrails. never moved just sat there about 5-10 minutes. then in the blink of an eye it was gone just disappeared.