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"Big Flasher" from Western Nevada - 4th April, 2001
Seems to originate from Fallon Naval Air Station

KNBC Weatherman Fritz Coleman during 6pm News in Los Angeles
There were two "flashes" during his presentation, the second less extensive.
The first and more pronounced flash was probably caused when the effect was switched in, and the second weaker flash was probably caused when it was switched out.

Playback the Broadcast Live

Download the clip in .mpg video format  (1.9MB)