This was my flight to Midway on the first fligth between BWI and the Chicago Airport, I think.  I recall a bit of a gate party
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/130275500@N02">G B_NZ</a>
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<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/130275500@N02/22016845639/">Southwest 737-300 N334SW at BWI</a>