Arlington
A county and city in Virginia, directly across the Potomac from Washington, D.C. Arlington holds the Pentagon, and Arlington Hall, whose cryptographers other agencies send for when a message will not come apart.
Arlington, formally Arlington County, sits in Virginia directly across the Potomac from Washington, D.C., close enough that a good deal of the federal government has settled on the Virginia side of the river rather than in the capital itself. The Pentagon stands in it. So does Arlington Hall, whose cryptographers are the people other agencies send for when a message will not come apart.
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