It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
Andrew Leyden wrote in response to Sara Cook tweet: “There are several types of anti-aircraft missile batteries around DC, near DCA, JBAB, Carderock and other locations. That one you spotted was actually put in place many many years ago.”