credit captionxyxyxy captionxyxyxy captionxyxyxy captionxyxyxy captionxyxyxy captionxyxyxy captionxyxyxy captionxyxyxy captionxyxyxy captionxyxyxy captionxyxyxy captionxyxyxy captionxyxyxy captionxyxyxy captionxyxyxy Virginia Democratic Senate candidate, former Gov. Tim Kaine addresses the Northern Virginia Technology Council’s Tech Town Hall in Reston, Va., Thursday, June 28, 2012. (AP Photo/Cliff Owen)
** FILE ** Virginia Democratic Senate candidate, former Gov. Tim Kaine addresses the Northern Virginia Technology Council’s Tech Town Hall in Reston, Va., Thursday, June 28, 2012. (AP Photo/Cliff Owen)
Washington Nationals' Ryan Zimmerman watches his second home run during the third inning of a baseball game with the Atlanta Braves in Washington, Sunday, July 22, 2012. (AP Photo/Cliff Owen)
** FILE ** Washington Nationals' Ryan Zimmerman. (AP Photo/Cliff Owen)
Utility workers secure power lines as their team repairs electrical wires downed by fallen trees in Springfield, Va. (AP Photo/Cliff Owen)
A utility worker clears a downed tree in Springfield, Va., Sunday, July 1, 2012. A severe storm late Friday knocked out power to approximately one million residents, traffic signals and businesses in the region. (AP Photo/Cliff Owen)
Utility workers secure power lines on Sunday, July 1, 2012, as their team repairs electrical wires downed by fallen trees in Springfield, Va. (AP Photo/Cliff Owen)
Fireworks explode over Washington as the United States celebrates its 234th birthday, Sunday, July 4, 2010. Seen from left is the U.S. Capitol, Washington Monument and Lincoln Memorial. (AP Photo/Cliff Owen)
A utility worker clears a downed tree in Springfield, Va., Sunday, July 1, 2012. A severe storm late Friday knocked out power to approximately one million residents, traffic signals and businesses in the region. (AP Photo/Cliff Owen)
