U.S. Political Map (credit: U.S. Department of the Interior, U.S. Geological Survey, The National Atlas of the United States of America/nationalatlas.gov)
(credit: U.S. Department of the Interior, U.S. Geological Survey, The National Atlas of the United States of America/nationalatlas.gov)
(credit: U.S. Department of the Interior, U.S. Geological Survey, The National Atlas of the United States of America/nationalatlas.gov)