As reported
Unknown over Chesterfield/Creve Coeur (St. Louis County), MO
A witness account on file, unevaluated. Most of the archive rests here, and honestly so.
The report, as filed
Unknown arial phenomena over St.louis county (Chesterfield/ Creve Coeur). Extremely large flash of white light midnight April 5th, 2009
Held as-reported from National UFO Reporting Center. Witness text is preserved verbatim, including its spelling; nothing is edited beyond formatting.