As reported
Other over Chicago/Ohare, IL
A witness account on file, unevaluated. Most of the archive rests here, and honestly so.
The report, as filed
1 craft changing shape and color at same time following a md-88 or 90 above it crew of plane never knew.
Held as-reported from National UFO Reporting Center. Witness text is preserved verbatim, including its spelling; nothing is edited beyond formatting.