This aerial photo shows damage along Stagecoach Road in Glade Spring, Va. from Thursday, April 28, 2011, tornado. An official estimate of the damage which spread from southwestern to northeastern Virginia was not available Thursday, but there was enough for Gov. Bob McDonnell to declare a state of emergency. The declaration allows state resources to be used in local recovery efforts. (AP Photo/The Roanoke Times, Eric Brady) 

This aerial photo shows damage along Stagecoach Road in Glade Spring, Va. from Thursday, April 28, 2011, tornado. An official estimate of the damage which spread from southwestern to northeastern Virginia was not available Thursday, but there was enough for Gov. Bob McDonnell to declare a state of emergency. The declaration allows state resources to be used in local recovery efforts. (AP Photo/The Roanoke Times, Eric Brady)