| The Columbia Encyclopedia, Sixth Edition. 2001-07. |
| Andrews Air Force Base |
| U.S. military installation, 4,279 acres (1,732 hectares), central Md., est. 1943. It is the chief military airport of Washington, D.C., as well as the headquarters for the air force’s high-priority airlift command. |
| The Columbia Encyclopedia, Sixth Edition. Copyright © 2007 Columbia University Press. |
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