As reported
Unknown over Arizona (Above; In-Flight), AZ
A witness account on file, unevaluated. Most of the archive rests here, and honestly so.
The report, as filed
Black "condensation" trail stayed at pace with jet for several minutes and then shot forward and all dissipated.
Held as-reported from National UFO Reporting Center. Witness text is preserved verbatim, including its spelling; nothing is edited beyond formatting.