Message posted by Night Stalker on July 10, 2020 at 15:44:14 PST:
"Siera98" and "Siera99" are often known to fly out of Travis AFB and are call signs commonly used when flying with demonstrators / black projects, by all accounts.
In Reply to: Re: SIERA98 airborne from Spokane posted by Max Power on July 09, 2020 at 11:43:09 PST:
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