Here's a clue - 10% of all U.S. federal procurement money is spent in this state.
Clue #2, this state hosts several federal agencies which include the Central Intelligence Agency, the Department of Defense, the National Geospatial-Intelligence Agency (NGA) and others.
What's in Virginia? Besides the headquarters of several federal agencies? About 263,552 federal employees and retirees according to 2008 stats, not to mention a host of defense contractors that call the state home. And within Virginia, the most googlers come from -- Sterling --
What's in Sterling, Virginia?
Screen capture above from Google Insights for Search which "analyzes a portion of worldwide Google web searches from all Google domains to compute how many searches have been done for the terms you've entered, relative to the total number of searches done on Google over time." The snapshots change according to search parameters.
Probably just interesting to nerdy cats like us ...