There were unverified reports that did happen at Langley on a Saturday, late last year or early this year ...
Hal Turner was secondary source for MEU @ Langley in 11/2017; no other confirmation: http://halturnerradioshow.com/index.php/news/u-s-national-news/1626-reports-us-marine-expeditionary-unit-meu-lands-at-langley-2200-marines