Wyoming "Annual Estimates of the Resident Population for the United States, Regions, States, and Puerto Rico: April 1, 2000 to July 1, 2008". United States Census Bureau. Retrieved 2009-01-26.  "Elevations and Distances in the United States". U.S Geological Survey. 29 April 2005. Retrieved November 9, 2006.  Unknown parameter |dateformat= ignored (help) In the event of a vacancy in the office of Governor, the Secretary of State is first in line for succession.