Originally Posted by exerda

I don't believe DCA is considered federal property or a federal building, despite being built by the feds. It's located in Virginia and run by the MWAA, which was created by VA and DC jointly. Apparently, prior to the establishment of the MWAA, both airports were operated by the feds, and IAD was on land in VA acquired by the feds... but court cases held they are "in" VA for practically every purpose, as do federal regulations. And the LEOs involved, outside the MWAA cops, are for the local jurisdictions (Arlington County for DCA).